I knew someone who had chronic pain of unknown origin for years. It can be maddeningly difficult to track down. And it was so frustrating when all the health providers had no idea what to do about it -- and some didn't seem particularly interested in trying. She didn't have a mental health issue either. They just gave up when their shortlist bag of tricks was exhausted.

All I can say is keep hunting around for a solution. You just have to find one specialist or practitioner who recognizes it or can figure it out. There are specialists who investigate and help with pain issues, if you haven't already been down that route.

I'm sorry, I know how pain can really wear you down when it just doesn't relent.