I've pain in chest left side & armpit. also around shoulder blade for 2 mths. ecg ok so i guess i'm asking ideas re: what next?

Chest pain: Those symptoms sound musculoskeletal. I presume you've a doctor, need an examination along with more history to work thru the problem.

Physical therapy: Continuous pain for 2 months isn't from a blocked artery more likely coming from pulled muscle or "pinched nerve." consider analgesia, range of motion exercises, heat and massage. Of course, if it is more intermittent, associated with physical activity other than movement of that arm, accompanied by short of breath, sweating, etc. Should be evaluated by professional.