what can i do with ny iron irritation?

If 8-9 is your haemoglobin level, I'd go straight for an iron infusion - no iron supplement is likely to work, especially with active IBD. The infusions work much, much faster and are less likely to cause GI side effects. The only downside is they don't last forever. In my experience, one Ferinject infusion lasts me 6-12 months before I'm anaemic again. I don't take oral iron, as I know from past experience I can't tolerate it.

If you have light bleeding but your hemoglobin keeps dropping, then it prob means your iron is also low. I wouldn't bother with iron pills. They take forever to work, irritate the gut, and if you're flaring they won't absorb anyway. During flares I got an iron IV at least once a month. Sometimes I even get a blood transfusion with it. I feel like a new person when I do! This disease is horribly draining on our bodies... it's amazing how much of the weakness is just blood loss.

All you can do is focus on making it to a better day, and get the different therapies you need. When I get iron, I get 300mg at a time. They have solutions with over 1000mg but I worry about that being too much. My bowels often get upset just from the 300, so I don't want to push it.

It takes about 2 weeks for iron IV to start becoming new blood, so you should start now.