I have also suffered from IBS for about 12 years....It's awful!!.....The first suggestion I have (if you haven't already done this) is to get a second opinion (Your GI Dr sounds like he's been livin' under a rock somewhere) .....You should be tested for ulcerative colitis, Crohn's disease, Celiac Sprue, they even did allergy testing on me, just to be sure that its not something other than IBS.....There are MANY meds out there for IBS, I've personally tried many, such as Bentyl, Pamelor, Paxil, Prozac, LevBID, Levsinex, and there are more that I'm probably forgetting.....The Bentyl seems to work best for me, and its a prn med so you don't have to take meds every day if you don't want to........Anyway, hang in there and you will find what works for you, you may want to get a second opinion if your current Dr isn't willing to help you out.......I hope this helps!!