Its been almost an year for me with back pain, but for the last 6 months its become very intense and unbearable. Pain is in the torso region and the worst in upper part and lower part. It runs down along the either sides of spine and is very bad at the scapula region of the back (shoulder blades), spreads across my ribs (chest pain).
It is not bad while I am walking or standing, but when I sit or lie down to sleep it is unbearable.
For the last couple months I am visting an Internal Medicine doctor. Got cervical spine, lumbar X rays done. Also got ECG, Treadmill test done.
Doc said there is a slight slip disc and was not sure for Rheumatic Arthiritis. Its been 1 1/2 month and all he gives me is high dosage pain killer tablets and muscle relaxers. Tried Physiotheray as well but no relief.
I am 30 yrs old and this pain has restricted all my daily activities, for the last 5-6 months i have not had a proper sleep.

Please, which specialist doc would you recommend I see that would help me diagnose and give a treatment? An othopedic or osteopathic physician or a chiropractor?