I had great success with self-hypnosis. It's much simpler/easier than one might think.
https://www.satanisgod.org/www.angelfire.com/empire/serpentis666/Self_Hypnosis.html
https://www.satanisgod.org/www.angelfire.com/empire/serpentis666/Satanic_Hypnosis.html
I basically go into a trance (NOT a deep one as there's never enough quietness to do it... But it still worked for me!), visualize my aura in the color fit for my purpose and affirm what I want for an X amount of times. I always focus on the affirmation being engraved into my aura and mind - but you may want to use visualizations as well? Whatever suits you personally.
I believe you could use self-hypnosis for how much things and events affect you. "I am greatly unaffected by negative energies, places, people and events, now and forever, in a positive way for me" (just an example)
As another person said, closing your chakras will definitely help: https://www.satanisgod.org/www.angelfire.com/empire/serpentis666/Closing_Chakras.html
Finally, pay attention to the accidental creation of thoughtforms.
A few years ago I had accidentally created a thoughtform, which made me think that I was being constantly drained by others (that other people sucked my energies). It actually happened once or twice, but then I got so obsessed with it, that I thought was happening ALL the time - and it was actually the result of that thoughtform. If I remember correctly I had "killed" it by vibrating... G? (G-ee) I'm not entirely sure... You could possibly find a Sanskrit word for "banish" for this thoughtform (I mean, Veenasa exists... You could do it for the thoughtform - if it's a thoughtform to begin with). Nevertheless, the important thing is to not focus on these emotions.
You could use self-hypnosis for your emotions towards the health problem as well. I entirely understand that it must suck to not be able to do all things you need to do because of a health problem (I'm in a similar situation), but you could change your attitude towards it. When that health problem doesn't let you continue with your responsibilities, you could take advantage of that and use it as an excuse to catch up on sleep, do some relaxing tea (or whatever would ease the pain) - make yourself feel good in some way. Don't feel like it's a "waste of time" if you can't go on with your responsibilities. Your body's in pain for a reason. You know the reason, you know the problem. Give yourself some more time, some patience, be understanding with your body.
Also, there was a similar time for me (in regards to not being able to handle all the negativity) some time ago... When the immigrant "crisis" first began, and there were many news with women being raped. I had become so obsessed with these thoughts and news, that I would think of them SO much, I had literally entered a phase of depression, where nothing was worth anything. I didn't care about anything, nothing had a purpose.
One day I remember I had to go to a friend, and I was just feeling so empty (in other circumstances I would be very happy to visit that friend).
I'm not sure if the following will be of help to you, but I will tell you.
One of those times when I had heard of these bad news, I had sat on my bed and focusing on these, and felt like I was going to die from all this sadness, and I heard a voice in my head that said "It does not concern you". I wasn't sure what to make of these words. Was it a God/Goddess? Was it my Guardian? The words may sound harsh to think that a God would say them.
However, the truth is that I was so focused on the bad things and news, that I was almost living these situations. I was taking in all this pain and misery and just drowning myself into it. It didn't help me. It didn't help the victims either. I was just drowning in sadness.
I know the words that I heard were harsh (or at least, they sound harsh to me), but the moment I heard those words, I stopped feeling this extreme sadness. It's like my emotions had come to a halt and I felt nothing; void. Neither good, nor bad.
So, I'm not sure if it will help you. Because I entirely understand our need to help others, but we must not let ourselves be immersed by the sadness and pain that exists in our world. We need to rise above it, and help the rest of humanity rise above it as well, in whatever way each of us individually can do that (and collectively of course). But I also understand that you say these feelings come on their own, and you don't try to focus on them on purpose, so my situation may be different from yours. However, I wrote it in case it helps you out.
Finally... I had written a text some years ago. I saw again something very bad in a movie, and I couldn't stop thinking of it. I remember that I was crying, and at some point my crying stopped, I had to do yoga and while doing yoga I started crying again. When I stopped and lied down, I talked to my Guardian (amazing Goddess Bastet <3) and she said some things that really helped me out. I will copy-paste my text here, in case it helps you out as well (though again, I understand what happens to you happens without you focusing on it; but it may help you out; and you may try to implement this logic in self-hypnosis in some way?):
This world is getting better… 
And it is not just you…
Hello!
After some intense contemplation, I’ve come to realize that this world is getting better… and it’s not just us who are changing it. I want everyone to realize this -or at least the people who tend to take things too seriously and at times feel hopeless for all the things that need to be changed so that we can re-create a Golden Era…
For all this time I had gotten used to seeing the wrongs of the humans around me. Although I DID (and still do) believe and *know* that humans are kind and beautiful creatures by nature (we have Satan’s blood after all
), I realized that I would never truly note the good, beautiful things that happen in society; and rather, I would emphasize the negative ones, thinking of them over and over again, feeling troubled and responsible for what *I* have to do, in order to change all the wrongs… But this is not right. I am, but one person, and the humanity is vast compared to me. I am not all. I can not “save” all. I do try, in my own ways, to help humanity, to help the people I love, to help my Brothers and Sisters in Satan… But I’m not able to save *all* and everyone.
And I was feeling bad for this. I was feeling horrible. Why can’t I change the world? Why can’t I save the people who are in pain? Why can’t I heal everyone, but also make them understand that it’s Satan who gave me the knowledge of healing? Why can’t I tell them the truth? Why can’t I make people see the true issues they have in their souls, while it’s so easy for me to see?
I am, but one person. One human. Since I want to, so badly, why can’t I do it?
That was my thinking… For so long, so many years, I hadn’t even understood it myself until now.
I was constantly thinking that I was alone in this. I was alone, and the entire world was depending on me to save them. I was responsible for all of them; *I* would be the one who would change everything, because people depend on me (even if they don’t know it themselves xD).
I was living with such a big and heavy lie for so long and I still can’t believe that I saw through it.
I am not alone. YOU are not alone. We are not alone. It’s not just us who wish to change the world… Of course, when you think about people who wish to change the world, you’ll first think of your Brothers and Sisters, right? But it’s not just us… Everywhere around you… Everywhere. People devote their lives, their professions for this change they so desperately wish to achieve. Policemen, doctors, even lawyers. Sure thing, there are the corrupted ones as well but for now do not try to find the needles in the haystack. I can assure you that there are also some jews in this group who post messages vividly and act like they’re with us. But that won’t pass. The dirt will perish. Because we are not as weak as a haystack, and they’re not as strong as the needles.
The thing is, everyone strives for this change… Everyone tries in their own way to save the world, and for all these years I just… couldn’t see it. I thought I was the only one. I thought people suffered because I wasn’t good and strong enough in order to save them. But these people are not waiting for “me”. They are not waiting for one person to give a temporary relief for their pain. They wish to see the change… To see the world change. Someone will save them, sure, but if the world doesn’t change in itself, then the problems will re-occur again and again, in another place, in another time… One mere person will not bring the change. It’s ALL of us, united, Brothers, Sisters and even the ones who are without, who strive through their own struggles and feats to achieve this change, to see humanity happy again, to help people see the goodness that exists in their souls. (hey, obviously I’m not talking about the jews here…. NOR the christians. You don’t “save” someone by taking him to the church. You save someone by putting in jail the one who hurt him, by giving him justice etc etc etc)
So, if you are one of those people who tend to believe that the entire world is resting on your shoulders, please stop believing that… This is not true. Obviously, you’ll be one needed link to the chain who will bring the change in this world, but it’s not only you… It’s not *just* you. You are not alone. Do not get discouraged if you’re not strong enough; you *will* be really powerful before you realize it but the entire world will still be too much for just you to handle. And you *don’t* need to do it alone. People you don’t even know, are changing the world as you read these words…
One more thing I’d like to add… A contemplation I realized (or, it would be more proper to say “a contemplation my Guardian made me realize”
) is that the people who are without and try to change this world, they do it by aiming towards specific groups. To be more precise: the policemen will help the victims. The doctors will help the patients. The lawyers will bring justice. While WE, as Spiritual Satanists, help the entire world all together. By doing group rituals, and even by sending energy to our Gods, by spreading the truth on the Internet and on the streets by putting little stickers with the joyofSatan site here and there, we are helping ALL of humanity ALL TOGETHER. Not just one person. Not even a “group of people”. Our power is fierce and together, we are literally limitless… This is the truth. This is our real nature. This is what humanity was always meant to be!
HAIL SATAN!
HAIL TO OUR VICTORY!
)=empowering all chakras and strengthen will+confidence. 
