Jupiter is known as the greater benefic so I would look at other causes for this, as the other planets or other negative energies in this world can be much more punishing.
What exactly do you feel lost on? Is this a matter of procedure, or just one where you feel bad and find it hard to restart?
Think about easy things you can do to regain energy and control, like alternate nose breathing, breath of fire, yoga or qigong routines, even simple cardio or other exercise. While focus helps with everything, usually you can get away with less focus here, which makes them easier to do than full meditation.
Also, take care of your aura and protection, as this can also be done without too much effort. Just rest your focus on your body and chant the cleaning or protective energies. Then, envision them doing their actions around you. This shouldn't take too much effort, but it also goes a long way.
Lastly, make sure your elements are in order. If your head feels like it in chaos, this sounds like a lack of the earth and fire which creates grounding and focus, respectively. The same can be true if you are being hard on yourself, therefore lacking the optimism of fire.
For this, you can try to balance yourself with ether energy, such as programming the Akasha mantra, or you can chant runes like nauthiz or sowilo and program them to give you discipline or confidence for a short while. Doing physical exercise also helps with this same problem.