It's too bad you couldn't do the colonoscopy at the same time, but it's great that he's getting you in so soon for the endoscopy. Hopefully they find something.
I did the 24-hour urine test a couple months ago. Fortunately, I wasn't having any D issues at the time, but since I've got a history of D it was at the back of my mind. (okay, that sounds icky.) I made it through OK, though. I think that you're doing the best thing by taking Imodium -- I know it won't help you afterwards, but at least you'll get through the test and have one less thing to worry about.
-------------------- jen
"It's one of the most serious things that can possibly happen to one in a battle -- to get one's head cut off." -- LC