Yes I also felt a bit lost and frustrated in terms of my anemia problem. My iron levels were very low even though I felt ok for bout 4 months. Just didn't have much energy. I couldn't get iron into me. My colon wouldn't take the normal medical prescribed iron pills and if I ate red meat I would develop UC symptoms.
I experimented with "lighter" iron tablets at a heavier does (with my GI's permission). These seem to work fine. Have zero GI distress from them. I also drink an iron supplement each day. It's about
10 teaspoons in a satchel that you mix with half a cup of orange juice. Again zero GI issues with that.
If you can get through the first 2 weeks of iron intake it seems from my experience that your colon and stomach settle down. It was hard at the start but I do believe that my body has adpated to high dose iron being ingested. I was a really bad case. My body couldn't accept iron. Now it seems to have zero problems. Maybe if you can give it a go for 2 weeks and try and get through that period things will settle down. But check with your doctor first of course.
1600 mg Asacol + 500mg suppositories as needed