They're sending me for a colonoscopy on Monday. This is obviously because they're concerned about the fact that I've still been having issues despite being on the gluten-free diet for a month now. I'm wondering if I should go ahead and eat gluten so my diet will be close to what it usually is before they do the colonoscopy. or if I should wait since they want to see what's going on despite the gluten free diet? Thoughts?
I'd stay gluten-free until you have a diagnosis indicating otherwise. If, for example, you come back with a Crohn's diagnosis, you'll know that you need to go on the refined grains, no beans, and cooked fruit/veg regime for a few weeks to see if that helps. It's the "whole" wheat that's getting you more than the "wheat."
If you don't get any findings from the colonoscopy, go through any potential sources of contamination again. I kept finding them for a while... none of which made huge differences individually but cleared up random questionable issues.
P.S. It's possible to have celiac + IBD. I think you don't need to go there quite yet...