Yeah that sounds like a lot to handle for you.
Doctors are hit or miss really.
Did you go through with the upper GI? I’ve just read briefly about it. But sometimes it’s worth going through with what the doc wants first, and if it doesn’t pan out they might be more inclined to accept suggestions.
But if you live somewhere where you don’t have free healthcare I can see why someone wouldn’t want to do that.
Are you from the US?