Have you tried any mid back mobilizations? They help with dorsal or thoracic nerve pain, pain from a lot of desk work or activities that require looking down. I found a PT on Youtube who demonstrates simple mobility exercises that helped a lot. I had dorsal scapular nerve irritation and had what I thought was the MS hug. The spasm and tightness was so bad that it affected my diaphragm. Problem with a lot of docs is they only look at the nerve roots and not the branches or nerves that arise from the root nerves.