I cannot believe how exhausting (and expensive) this investigation has been for you. I had a GI surgery and one of the possible outcomes was permanent nausea, and when I woke up I had nausea for about 3 months and it was horrific. The symptoms resolved on their own after a while, and for a time I believe them to be psychosomatic, so I began meditation. In the end I don't know, but that must be scary.

I'm curious if fecal microbiota transplantation has been discussed? From what I can tell the gut biome is under studied and the effects are pretty scattered and wide. Thoughts?