I was experiencing pain in my back, under my left arm and a little in my chest (left side and some right). I went to the hospital and had multiple test done (EKG, Blood Work and Chest X-Rays). They all came back fine. The doc said something about musculoskeletal wear and tear in my back and gave me a prescription for pain killers and muscle relaxers. He also has me going to see a cardiologist for a stress test to rule out any heart conditions. The chest pain is all but gone, but the pain under my left arm still comes back as well as the back pain. I had trouble breathing before I went to the ER, but that s gone also. Could this be more than just what he said or am I just worrying about nothing?