My GP says that I have IBS, but I am getting worried about the possibility of colon cancer. I have had numerous widespread symptoms over the past four months including nausea, acid reflux, horrible cramps, diarrhea after fatty meals, constipation, mucus in stool, and gas. I recently tried the drug Bentyl and had a horrible IBS attack right afterward. It's been two weeks and I have not been eating well. I am now showing symptoms of anemia after losing a ton of weight, but this may be do to my poor diet. Either way, I am afraid to eat because it often results in gas/cramps, even if it's mild. I'm only 19 and I know it's unlikely that I have colon cancer, but I am still concerned. So what should I do? My GP doesn't think I need to see a GI specialist. I disagree.