How frustrating for you..it sounds as if the docs are still not that sure about what is going on. I have had GERD for 12 years and your excessive salivation doesn't sound like GERD ..could it be an allergic reaction to something?

Also, I have said this before in another post, but please you all be careful of those proton pump inhibitors/acid reducers...they don't make sense to me at all...gerdies do not have too much acid, the acid is just leaking. We need the acid to digest our food. I took Prilosec for 3 years and it gave me many stomach polyps. I now just sleep with my torso elevated instead.

ps..I also grind my teeth so my dentist made me a mouth guard. That really helps.