I'm confused. Why are you gluten challenging when your doctor told you that you were latent celiac? Did he explain that celiac disease is progressive and the more gluten you expose yourself to, the worse the autoimmunity can become?
Get off the stuff and get well again. Things should start to settle down in a couple weeks. If you're so weak on gluten challenge that you can't even tolerate a bowel prep, you have your answer about celiac anyway. Do yourself a favor and refuse further challenges to avoid making your gluten problems worse.
The reason I continued eating gluten after my pregnancy is because my new GI did bloodwork that came back normal (I had to change GI's once my other one moved out of state) and the new GI also told me that I didn't need to be gluten-free.