I am experiecing moderate chest pain but it is mostly in the middle of my breast bone. The pain is sharp especially when i breath hard or burp and when i bent down/over. It has been hurting for 2 1/2 days, preventing me from sleeping for more than a few hours at a time. I don't think I had any injury that would have caused it. Any help would be appreciated, since I have no health insurance to go to the doctor.