Sounds digestive related to me, I get pains when I have a lot of gas built up. It is good to work with your doc though, then you will know for sure.
I don't have any specific experience, but can say: work with your doctor(s)....it is important that you find out what is causing the chest pain. It could be lots of things besides the heart, and best, I think, if it is something to due with indigestion.