JHarvey,
Sorry about your flaring. Don't beat yourself up about hoping the remission is within your grasp, we've all been there.
I've never found prednisone to be helpful with my bleeding, but that's just me.
I agree with the others, definitely get some rectal meds.
It's good that you are doing L-glutamine, and SCD too.
And yes, Vit. C can give you diarrhea for sure.
Which probiotics are you using? VSL#3 has 450 billion active cultures and is especially formulated for UC.