I'm sorry that stretching is causing you so much pain. I used to stretch nightly and I it began to feel like it was causing a flare up in my RSD. I than began doing all my "stretching" type activity in the pool. I've recently had a SCS implant and am not cleared for water activity yet. Since this last surgery my pain seems to have gotten much worse. I'm really hoping getting back in the pool will help. Also, just a tip, you can ask your physician to write you a Rx for a year of aquatic therapy. Then submit it to a PT clinics/or aquatic centers for a year pass. Sometimes they require you to pay ahead and then submit for repayment, but either way it's nice to have your insurance work for you.
I hope you are able to find some relief soon.
Eli