I am not sure that I even have IBS. I have a doctor's appointment a few weeks to see what is going on with me. Last Sunday the diarrhea started. I am going after every single meal at least once, usually within a half hour, and sometimes up to 3 times. A few nights it has woken me. I have moderate stomach pains that come on very suddenly and give me, not to sound disgusting, a 10 second warning. Before the diarrhea started I had about a week of very thin, floating stool that was pale in color. The day the diarrhea started was my first day back to eating cheese as I gave it up for Lent and my first day back to being off carbohydrates which I ate during Lent but have not eaten them aside from this since July. I am worried that it might be cancer. I am 30 years old. Am I exhibiting symptoms that are typically of IBS? Any input would be helpful as I haven't been sleeping well due to the worry.