I feel ya. I was diagnosed with IBD (ulcerative colitis) 3 years ago and never really had any issues. This year I've been in hospital twice and have learnt that it can cause lactose intolerance to develop and that there's overlap with IBS so there are foods which can give me explosive diarrhea. 3 years I wasn't overly cautious and now I'll be making sure I check ingredient lists and understand them and actually learn what foods are triggers. Likewise I wasn't told about lactose intolerance or the IBS overlap.