Deep chest pain and goin into back, sore when breathing and if i press on my chest bone it's sore. pain coming and goin for 7months?

A few clues: Well, because it gets worse when you compress your sternum (which is connected to your ribcage by costochondral joints), your pain sounds musculoskeletal. Such pain would be worse with respiratory movement and could affect both front and back. Since it's intermittent over 7 months, we can assume it's benign. Fibromyalgia or inflammatory arthritis should be ruled out. Trial of nsaids?