Glad to hear that your tests provided good news. I know it's hard when you're trying to get answers. Don't worry about the manometry and PH monitor. It's mind over matter...you can do it!
Here's hoping you get to the bottom of what's causing your problems.
Words of wisdom by Eckhart Tolle:
"Whatever you fight, you strengthen, and what you resist, persists.”
“Worry pretends to be necessary but serves no useful purpose”
“Accept - then act. Whatever the present moment contains, accept it as if you had chosen it. Always work with it, not against it.”