I am 26 yr old female and I have had chest pains behind my left breast and some closer to the middle at times, the pain varies I know that I had one supper bad pain pain about a month ago and I was getting out of my car to go in the gas station and it was only a little to my left from the sternum, and it almost made me fall. I have been having pain behind my breast for 2 years and I have test negative for everything EKG, stress test, thyroid, etc.. There has been nothing found, they put me on anti anxiety medication and that didn't help at all still had pains, I am very concerned because heart problems run in my family My father just a quadruple bipass and his mother passed away do to massive heart attack. If there are any suggestions I can get that would be great I plan on going to the doctor for this I would just like a little more info before I go in that could possible help them figure this out. Thank You for your time..