I have GERD for many years and am taking Protonix 40 mg 2x day and 150 mg of Zantac at night (when necessary.)
What is the condition of your LES, since the stomach contents are leaking back into your esophagus and therefore into your throat? Perhaps you have a pinhole in the LES which is not detectable by today's technology?
Just because the Esophageal Manometry is normal, that is because they are not smart enough to detect everything.
How is this doctor going to treat you?
P.S. What is full name and location of this MD?