Chest pain in young healthy male?

My husband has been experiencing chest pains for the last month. We have taken him to the ER but no one is really willing to do anything because we don't have insurance. When we went to the ER they gave him ECG and that showed that he was definitely having heart palpitations at one point his heart rate was at 169 bpm. They did a blood test, but didn't tell us what they were testing for and when the results came back they just said that "he looks very healthy on paper" and sent us home. It has been 2 weeks since then and he is still experiencing this multiple times a day. He said that he feels like he pulled a muscle near his sternum but the muscle is sore all the way around his back just on his left side. Whenever he moves the "wrong" way he will get a sharp pain in his chest and then his heart goes crazy, and other times he won't have to move he will just be sitting there watching tv and without any pain his heart will start racing. Does anyone have any idea what could possibly be going on? The ER referred him to a cardiologist to be further examined, but without insurance its $400 just to walk in the door and then they bill you for the rest later, and that is way more than we can afford so we made an appt at the low income health center where we live but they can't see him for another month still. Please help!