Yeah, welcome to the joy that is the treatment of CD. The standards are confusion, pain, and docs not taking time to explain stuff. Oh, and meds with adverse side effects.
I was initially dxed with UC/Proctitis but the "upgraded" to crohn's. I've been in the fissure boat before. Other than kidneystones, I regared them as the worst aspect of a miserable disease..
I hope you keep feeling better, but don't expect your docs to ACTUALLY know more than you about your illness. You will have to be aggressive in getting facts & treatments. Become an advocate for your own care.