When I eat, gas in stomach, need to burp - what is this?

[Xicota]

Ever since 8 months ago, I am scared to eat because almost any time I eat, particularly if I have anything sweet, I get upper digestive tract bloating and feel like I need to burp but can't. It's very unpleasant and I can't think about much else when it happens.

It feels like some microbe or parasite in my stomach comes out and makes a gas that bloats my stomach or upper intestines. (This is different from the usual gas in the lower intestines.)

One of my doctors says I have H. pylori, and I wonder if that could cause this symptom?

Also, I probably have very low stomach acid, and I do better if I take a Betaine HCl capsule before meals. Taking digestive enzymes and Betaine HCl helps to prevent the terrible bloating/need-to-burp symptom.

But I don't think it's merely an issue of poor digestion, since the problem is worse when I eat sugar (which is easy to digest). I think it's some sort of bacteria or parasite that comes out to play when I eat, particularly when I eat things it likes.

I've had a similar symptom after traveling in Mexico and Peru. I've had a lot of different parasites and have taken a lot of different treatments for them, but maybe they were not all eradicated, or maybe some have returned now that I'm slightly immunosuppressed (according to tests) from some of my tick-borne infections.

I've been on antibiotics for 10 months for Lyme disease and some other tick-borne infections, but they are not necessarily antibiotics that would treat stomach infections or parasites. I've been on doxycycline, azithromycin, and clarithromycin at different times.