I'm a 26 year old woman with RA. My back along the right side underneath the scapula started hurting around Jan of this year with no known cause (such as trauma). I waited for it to heal and it didn't. So in June of this year I went to an orthoepdic back dr. and he said it was most likely a pinched nerve. I went to physical therapy for 3 months with little improvement. Last month it spread around under my armpit and into my upper ab area on the right side. I have pain in the upper abs right along the rib cage. I had a Hida scan and ultra sound to check out my gallbladder. That was all negative. I just had an mri of the thoracic spine and they said it didn't show any pinching but they weren't sure. Is there anything else this could be besides a pinched nerve? It's really hurting and hard to deal with for so long. Thank you for your opinion