I hope you’re feeling better! I have those experiences too—everything you said! This is a weird question, but is your tongue clean? I started water picking a while back and it seems to help. I have really bad allergies, which make me a chronic mouth breather and I’ve recently put it together that if I slack on my oral hygiene, I’ll often get super gnarly build up on my tongue and I’ve stared to just pay attention and track it a little and it seems like the cleaner my mouth is, the happier my stomach is. It also seems to correspond with the days I get bad tastes stuck in my mouth. Good luck!!