Sorry you are having so much pain. My 14 year old daughter has had CRPS for 2 years now with 11 hospitalizations and every drug known to man and then some. Honestly the best thing for he was the sciatic nerve block. She has her CRPS in both of her legs, they were able to insert a cathetar into her sciatic nerve on the top of her leg and infuse medication which worked wonders, the bummer thing is that it was only for 10 days. They had a “ball like” device that held the medication and it infused by a positive pressure technique. She was able to get a “break” and went crazy with PT/OT and was about 50% better once they pulled the cathetar. Now 4 months later was need another one, which is fine, but another surgical procedure to get it inserted. Check it out and do some research on it. This may be something to helps you too!!