Welcome to HealingWell!
You have come to a great place and we will help and support you as much as we can.
Initially I thought your symptoms sounded like a hemmie, but since your doc nixed that idea, I'm stumped. Did he mention a fissure? Usually people get fissures when they're constipated, which doesn't seem to be your case, but I guess anything is possible.
I do think that if your symptoms are continuing then you should see a doc. Do you have the option to see a different one than last time?
May I suggest you post your question on the Crohn's and/or UC forum as well?