You need to have a few more test but it does sound like IBS. Probably a colonoscomy(sp?)Celiac tests are done by checking something in the blood and its not very accurate. The Lactose test is 3 hours long, you have to drink a small glass of lactose and then you breath into bags every half hour or so and the measure something in your breath. I'm not sure about the frutose testing. You should check out a site called eating for ibs, theres a ton of info and diet guidelines there along with medications available and test to be done.