As mentioned, I am a new college student and have just been hit with the worse case scenario. Even the first morning I woke up in my new "home" I was hit with a serious case of diareah. I hoped that was just a one day deal but as time went by I've actually come to expect it on a weekly basis. At least once a week and usually MORE I have diareah. I could blame my lactose intolerance (lactose is common in foods like lunch meat, bread, cereal etc all things I ate frequently upon my arrival) but I wonder and really fear that there might be more. I fear that I might have a bacterial problem but I don't want to rush to the doctor. What are the possibilities of a bacterial infection causing periodic diareah?