What a horrible doctor. I have IBD (Crohn's) and IBS. I've had a colonoscopy every 6 months for the last two years. It should not hurt. The worst part is the prep, but if you follow Jill's advice about eating lightly a couple of days before it will help. I used to pig out before it figuring it was going to be cleaned out anyway, but I do think it makes the prep worse if you have more stuff inside. The drugs they give you are pretty good, I usually drift in and out. I've had a little cramping afterwards when they take biopsies, but it's nothing serious. My GI has said the same thing about the meds for IBS, although in a nicer way. He has prescribed them for me but I have found that the peppermint capsules and the tea helps a lot more and without any side effects. If you do have IBD, don't despair. Unlike IBS, meds do help IBD. It's not a fun disease by any means. It comes and goes unpredictably, it's chronic so you will have to deal with it for the rest of your life, but you can begin to feel some control over it in time. So I hope you get the tests. He is right, left untreated IBD can cause major problems. Good luck and take care!