Jennie, the only real way to find out what causes you problems is to keep a food journal. Right everything down, Even down to chewwing gum. ( when you chew gum you swolloe air which can upset your system as well) Keep track of anything you put in your mouth. Then right down how you are feeling. Bloating, gas, running for the restroom. Then also right down anything that might of caused you any stress during the day. That way you have a complete look at all the factors that could trigger the IBS. I would keep a journal for at least a month. Sometimes IBS can be triggered by PMS as well. Then you can sit down and look at everything that's triggering you and you then could try cutting the things out you think triggered you and see it that helps any.

Good Luck, Monty