@hus I do hope you see a provider that gets to the root cause of the nausea. Ten days of nausea and 24/7 diarrhea is just awful and I sympathize with you. It sounds like your Gastro physician will be the most helpful as they are willing to refer you for other diagnostic tests.

My little anecdote is that when I changed my diet on the advice of an integrative medicine physician I began eating broccoli several times a week. Broccoli is my favorite vegetable other than carrots. Maybe I’m part of rabbit? But I digress. I was worried that my bouts of diarrhea were due to cancer as I’m a cancer survivor so I think every little change in my body could be cancer. After checking in with my radiation oncologist and my integrative medicine physician I figured out I was eating too much broccoli. Broccoli is too fibrous for me. So I limit broccoli to once a week and eat other veggies instead.

The vagus nerve originates in the brain stem and extends throughout the head, neck, and body and innervates the heart, digestive tract, lungs, spleen and kidneys. It also innervates the autonomic nervous system’s sympathetic nervous system - the fight or flight system and the upper part of the parasympathetic nervous system (rest and digest system). I am sure you know all of this from the research you’ve done. It’s possible that something else is giving « information » to your vagus nerve that is causing the nausea and diarrhea. Just a thought but something you could ask a specialist.

Will you please come back here and let me know what you find out?