So, I have R-CPD. Colloquially, "no-burp syndrome". I can't burp. Never could.
I never thought much of it, I thought it was kinda funny and odd, but alas, who cares?
Only recently, it was brought to my attention that this was an actual medical thing that can cause all kinds of issues - most of which I have! (abdominal bloating, constipation, heartburn, not being able to "fully breathe in", painful hiccups..)
I've always ascribed these issues to my IBS/SIBO, but I'm starting to understand that it might very well be the other way around!
Not being able to burp => means pumping massive amounts of oxygen through my GI tract => means IBS!
It's caused by some muscle in your throat not having a "relaxation" setting, and good news; there's a relatively simple procedure to fix this!
All this, both the medical recognition of the issue, and the fix, are pretty novel; like only some years old. So many people may have this, but not know about this thing at all. That's why I wanted to share! Cheers!

Hopefully your regular GP comes back soon and you can get the procedure sorted out.