Ten minutes before each meal I take Dr. Shade’s Bitters available on Amazon. It’s a liquid digestive blend and I take 2 pumps of the dropper it comes with. It was prescribed by my doctor and it’s purpose is to start the digestive juices that decrease with age. That helps with meal digestion to prevent food from staying in the small intestine where bacteria can feed in it creating SIBO and gets the bacteria back down to the lower intestine where it belongs.
I understand you’re frustration with the medical community, experiencing the same. I had 3 endoscopies before I went in search of a functional medicine doctor. It took 3 tries before I landed with one of the best. If you’re interested, the website ifm.org has doctors listed by city and state. Each doc has a bio and their specialties.
Best to you, I sympathize and empathize for you.