I don't know if this is relevant at all, as I am not sure what kind/what extent of damage you have with your spine, but could you benefit from a chiropractor at all? Other than my completely insane autonomic system, I don't have nervous system problems, but I do get extreme headaches at the base of my neck/back of my head, and chiropractic care relieves them. I'm sorry if this isn't helpful, and I hope that you figure out how to manage your headaches! Meg