You might be gluten intolerant... I was in a similar situation few years back. In fact, mine was even worse and used to have upset and bloated stomach, nasty IBS and whole nine yards. I had to go through whole endo and colonscopy before my GI diagnosed that I had Gluten, wheat and lactose intolerance. I started cutting those on my diet and it feels much better. I cheat every now and that is when I have problem. It is not always easy to turn your eyes from your fav beer and burger.