You sound like me when I was first diagnosed. I didn't have much diahrrea, but I had severe fatigue and joint pain. now, three years later, the disease and morphed some. Lots of diahrrea, same fatigue, but rarely have the joint pain. I don't know much about the lab. I've heard that it's not 100%, but that it's pretty accurate. i think you'll find that there are not many "typical" crohnies around here. everyone seems to have some weird symptom or occurance. in fact, that'd be an interesting post. I might post that question so you can see how variable things can get. good luck!
diagnosed: Crohn's Aug 2005
other set-backs: Vasculitis Aug 2006, Sub-total Colectomy (10 inches of colon left) Feb 2007, Ogilivie's Syndrome Mar 2007, Pulmonary Embolism Sept 2007, Collapsed lung Oct 2007, Recto/Vaginal fistula Nov 2007
drugs: Imuran, Remicade, Prednisone, Fentanyl, Warfarin, Flagyl, Cipro, Celexa, Ferrous Gluconate, Acidopholous