This is tough. I admire you for how you've stuck through it thus far. It's in these situations that we need divine help. You're in my prayers. I agree that you should keep seeking answers until you find them. Have you seen a nutritionist yet? You may want to look outside the box of traditional medicine as well. I've known people that couldn't get help from their general practitioner, but found help with holistic helpers. I just encourage you to not give up.
What trauma have you been through? Any head or neck injuries? What emotional trauma have you dealt with, even early on in childhood? I know these may seem like strange questions, but I'm just trying to help you gain a different perspective with your CP.
Hoping the best!
-Jrom828