I have CRPS in my left knee - was in a wheelchair, insane pain for 2 years. I found a treatment in Italy that is now I think approved in the US- neridronatic acid - and I left Italy walking. Any of the residual pain I treat with small amounts of marijuana- primarily CBD. It’s been 2 years now and I’m walking and not in any significant pain until the weather changes. I believe that as long as you can get a leg up on the pain and keep sending the positive reinforcement to your brain that it can make a huge difference. I know, easier said than done. I read a similar story in a blog and started my course from that. Don’t give up hope!