Sometimes it takes people years to get diagnosed. My suggestion would be to ask for a pill cam. Most people have had the most success in getting a Crohns diagnosis by having this test done. It shows the areas where the colonoscopy can't see. I sure wish you luck in getting your diagnosis.
Been living with Crohn's Disease for 33 years. Currently on Asacol, Prilosec, Estrace, Prinivil, Diltiazem, Percoset prn for pain, Zofran, Phenergan, Probiotics, and Calcium. Resections in 2002 and 2005. Also diagnosed with Fibromyalgia and Osteoarthritis. Currently my Crohns is in remission.