First of all the dedication ritual is real and binding, it's not something you can undo. Second of all, you are probably under some sort of spiritual attack from the enemy, this is something that you can solve. You are newly dedicated therefore you are under the protection of the Gods. No need to fear, all the enemy can do to you right now is try to frighten you. You will not be harmed, the Gods will not let you fall into harm.
You can try to cleanse your home and environment now that you are dedicated, if in a situation where you are able to, remove any and all xian religious items from your home if there are any, such as bibles or xian imagery. I noticed a great change in atmosphere when I got rid of family things that I had been holding on to, that were xian in nature. That can help.
Also as blitz said, what are you doing for protection? There are many different things you can do for protection such as aura of protection, and returning curses, and using runes. Here are some helpful links to check out below. Make sure you are doing daily cleaning and protection. Also, Make sure you never doubt in your safety! You
are safe.
Aura of protection
How to clean your Aura
Returning curses pt 1
Returning curses pt 2
Do not be afraid, the enemy wants you back and they will try their best to frighten you and test your willpower. You must be strong and not give up! Also, you can meditate on Father Satan's sigil and confide in him with your concerns and worries. He will listen. It's important you trust in him and the Gods. And don't hesitate to talk with us here, we are always available to help and answer any questions you may need.
Stay strong! Things will get better.