6 months my doctor thought i had ibs and i took a whole bunch of different meds. After the D started to wake me up in the middle of the night i found a new Gi who ended up diagnosing me with Ulcerative colitis. After fighting this for 4 months i am now having to resort to Remicade treatments.
Make sure you have a good Gi sig scope you and test the biopsies before you settle for an ibs diagnosis. They always tend to dismiss this and try and tell you its in your head...but we know otherwise