Hi I Have Pain In My Stomach Every Time I

Hi I have pain in my stomach every time I eat my doctor have done so many test and he has not found anything wrong with me. I do not understand. The only thing he found is that my stomach is like a u. He said that one in a millon have a stomach like me. I don't know what to do to find some answers. Can you explain if is possible what it could be what I have?