I have been dealing with this pain for over a year now with no answers. I get sharp stabbing pains in my left side, starting at left breast and spreading to jaw, shoulder, arm, and shoulder blade. I have had all the tests done on my heart and lungs, they say there is nothing wrong. I was given a diagnosis of swollen chest muscles. Took naproxen and other muscle relaxers and pain relievers. Nothing works. Now they say it is from my c-4 through c-6 vertibre. They are slightly bulging, but no pressure on the nerves. I've been going to Physical Therapy 3 times a week for weeks now. It is not doing any good. The pains are just as bad as ever. Sometimes they will go away for days, other times I just have a dull nagging pain for days. The symptoms are typical for a heart attack, but no heart problems. Can anyone help? I have also developed a rash on my legs, and arms. I don't know if there is any connection or not. I can't seem to find the cause of it either.