Hi and welcome. This is an Ulcerative Colitis forum, but HealingWell does not have a forum for Microscopic Colitis. We have had people with Microscopic Colitis post on here before, though. Where are you seeing the words "Collagenous Colitis Microscopic Colitis" come up? I'm not sure I've ever seen that. Did it come up with a google search?
Have you recently had a complete bloodwork panel done? Perhaps you're low in vitamin D or something else. Is the Entocort disrupting your sleep at all? That could definitely cause problems with fatigue.
Editing to add:
I think I figured out why you thought this was a "Collagenous Colitis Microscopic Colitis" forum. I googled that, and found an old thread on the UC forum with the same title. I can see how you might have thought you were in a forum for that, based on the formatting. The larger font just under the blue bar is the post title, then the smaller font in the light blue bar tells you where you are, so to speak.