I had forgotten that you have bleeding as well. Have you asked this same question over on the Chron's board? They have to deal with severe pain as well, so maybe they have suggestions for better pain meds.
Also, sometimes certain pain meds just don't work. I don't know how many different ones they've tried you on, but Proproxy (I can't remember what it's generic for--demerol?) doesn't do anything for me. I'm better off taking Ibuprofen than that stuff. My aunt, on the other hand, doesn't get any relief from morphine. And there's something that doesn't work on my mother. So if they haven't tried you on at least a second pain med, then that's something to ask about. Have you had your scope yet? Hopefully that will give you some answers. If you do have Chron's, there are things they can put you on to help heal you up so that you hurt less and have less D.