You should try a low FODMAp diet. Many people with IBS symptoms have got much needed relief from this. What it does is greatly reduce or eliminate many foods high in FODMAP (this stands for something but don't know off hand what it is). Most of the food to eliminate fall into the veggie and fruit category. That doesn't mean you can't eat any, it's only certain ones like no onions, no cruciferous veggies, no apples, no mangos, etc. It also advises against dairy and what. After you calm it your symptoms down (about 6 weeks), you can slowly introduce one food at a time to see if it causes you a bad reaction. All proteins (meats, fish, eggs) are allowed along with white rice (jasmine and basmati are best), yellow potatoes, oats, and quinoa. It seems very bland at first from what most of us are used to but the results have been astounding for me and many others.