Some of your symptons could be related to CD.
I had frequent loo visits after eating, bloated and very tired. Initial diagnosis showed severe anaemia, a blood transfusion resulted in pink skin, not seen that for a while!
It used to be the case that a blood test could only suggest CD, a endoscopy was needed to be certain as they take a sample to look at the state of your villi. I have had several of these, certainly recommend being knocked out, a bit cowardly but it avoids what is not a nice experience as I have experienced.
If you are diagnosed with CD and that is the only problem, don't worry, it is far easier these days.
See my following post.