Have you been to any advanced PT for the pain and a posture/pain evaluation?
Often PTs will do a more in-depth hands on assessment than drs.

If you are having spasms or trigger points , some really good PT with perhaps heat, ultrasound, massage/ manual trigger point work, IF stim should be help to relive some of the pain. Possibly a top rib is raised up also, a rib mobilization can be tried.

Do not let then force you to lift weights or use hand bike or other things that will exacerbate your pain /symptoms.