heya @Former-Member, I'm so sorry to hear about this. It sounds like you've tried a whole heap of things and that shows a lot of determination.
I also live with chronic pain, although it sounds like I've not had to deal with it for as long. But my pain meant a lot of isolation, discomfort and real hopelessness for me. I recently came across a Pain Management workbook by Dr. Rachel Zoffness which has totally changed my life. I was skeptical until I listened to this podcast episode she did (linked here). I obviously can't say for certain that it will change things, but it was a real last resort for me.
and @creative_writer, sending lots of hugs and love ❤️ After my own SA, I felt the same as you but for different reasons. it took me a long time to change these thoughts. But I really hope they can change a little for you.