I agree with Nanners. If you suffer from hearburn you may want to just get that checked out with an endoscopy. I had GERD and hiatus hernia and it causes me chest pain. Sometimes it can get really bad ... like, make me fall down painful. But is goes away.
So yes, that would be the first thing I would check first.
Now, if you really really want peace of mind and insurance will cover it, get yourself scheduled for an echo.