C.M.
I've had a sensitive stomach my whole life but I was formally diagnosed with IBS when I was 21. Diet sodas or diet anything kills my stomach, so does top ramen (which sucks because they are so yummy), alcohol, and basically anything else processed will send me running to the bathroom. When I get stressed out, my IBS gets worse and if I don't get enough sleep then it acts up too. I really like the prescription Donnatal. I've tried a few other prescriptions, but that one seems to help the most. My friend at work also takes donnatal and it helps her too. Good Luck!