Sounds like you need to go to a gastronologist. He can give you exams or tests that can hopefully define your problem. En endoscopy could be what you need. They take a small tube with a micro camera and run it down your throat...no worries, they put you to sleep:) They can see inside your stomach and locate problem areas no only by pictures but by the biopsies they will take. They take sample of stomach tissue and they send it to be tested. Since no one else sees a problem, I suggest you go to the tummy experts, gastronologists.