Sorry you are having such discomfort! What you're describing sounds like bile, which is normally associated with acid reflux/GERD. I've never had the tests you're talking about, only a scope. I was at one point having severe bile non-stop, to the point where I couldn't even lie down. Ask your Dr. about prescriptions to help diminish the bile. I was on one that really helped, although unfortunately, I cannot remember the exact name. But that one my GP prescribed, so I'm sure a GI or GE would know right off the bat different medicines that would help.
Hope you feel better soon! :) Keep us posted!
And days go by
I can feel them flying
Like a hand out the window in the wind
And cars go by
Yeah it's all we've been given
So you better start living right now
Cause days go by