I am so sorry girl!!!
Have you tried an elimination diet by chance? Do you notice your cramps after eating a particular food? Gluten intolerance seems to be the hot topic lately but it is real.
I was talking to my sister about
it (she's a family physician), & she said our wheat/gluten now is so genetically modified that many people's bodies aren't tolerating it.
I personally took a breath test to test for celiac issues 2 yrs ago when I had a few months of gut problems. It came back normal.
My bff's daughter was having doubled over cramping like you and diarrhea, mood changes etcccc. She had the surgical procedure where they scope you & nothing was found. She was getting no answers so cut out gluten on her own & she improved!?
Bottom line, I'm looking forward to you getting tests and hopefully answers. Praying for you & your filthy mouth too LOL (I'm a truckers mouth too so I 'ain't judging)
Hugs!
Lisa