Doctor wants to reduce meds - help!

 
I visited my doctor to ask for a different PPI as I am not coping well with 20mg. He said he was going to lower the dose as I should only have 10mg. This is because my endoscopy showed everything was normal.
 
I am quite obviously suffering from too much acid. Would the specialist have seen if I produced too much acid? I was taking PPI at the time which would have lowered the amount in my stomach before the scope?
 
Can anybody suggest what I can do, I don't think I can change my doctor for another opinion.

Thanks Jennifer.

Yes, I still have regular symptoms with 20mg. When I visit my doctor I shall be putting up a bit of a fight about this!

So the endoscophy can tell 100% whether you have gerd or not?