I don't know very much about Crohn's or IBD, nor do I know anything about the meds you are on. I haven't even had a colonoscopy yet - BUT - I am under the impression from what my doctor told me (I'm having mine done in September) and from other things I've read and from people I know who have had them done - that you're sedated pretty heavily during the procedure and most people wake up not remembering a thing about it. I've also heard that the worst part is the prep for the test. But there's a post on the Crohn's Message Board taken from Jill Sklar's book about prep for the colonoscopy Colonoscopy Prep Post I'm planning on following her suggestions when I have to go through this next month.
I probably wasn't much help, but I wanted to share what I've heard about the procedure and offer some support. I am also very apprehensive about getting this test done - in fact this is the third time I've re-scheduled it Hang in there and good luck. I hope other people have some more informative advice to give you