I read your post and would like to share my experience with you. This time last year, I was a complete mess. Last December I was on 60 mg of Prednisone, which finally stopped my bleeding. Obviously, there were terrible side effects, but it worked. My doc put me on 175 mg of Imuran. It took a few months, but things got much better and I weaned off the prednisone by March. I started suppositories nightly, which also greatly helped.
My last scope showed my proctitis totally healed. I still had a little inflammation in the sigmoid. So, my doc put me back on Lialda (2 pills). I am happy to say I am in remission! No more blood, no urgency, and formed stool!!! I have my life back.
I was so afraid of the Imuran, but that, combined with rectal meds (which I now take every 3rd night) have really worked. It takes a lot of patience. In my case, I finally found a GI ( my 3rd one) who listened to me and worked with me. Wishing you the best!