It could be IBS. You should have a colonoscopy to verify, but most likely it is IBS. IBS is aggravated by stress. Also diet is a big factor. For example, for many of us, we simply can't tolerate gluten and dairy. I have the opposite symptoms, but it's all IBS. When the doctor does the colonoscopy and sees nothing but what looks to be a healthy pink colon, he will conclude that it's IBS. But, it's best to have the test done, just to be on the safe side. These colon symptoms can sometimes be other things, too. More than likely, though, it's IBS.