Hi, I have pain in my chest for about 5 months. First it was on the left side, left hand. I was in family doctor, he took blood test, ultrasound, EKG. But he didn't find anything, he sad it's because of the stress. But my symptoms going worst. This last 2 days I have pain more in the middle of the chest, it's hard to breath... Where I have to go? What kind of doctors should I see! Please help me!!