I have LPR and doses for that are higher. I am on 80 mg total PPI per day and 1 Zantac 150 at night.
If I read your e-mail correctly you are also on 80 mg total PPI per day and 1 Pepcid, supplementing with Gaviscon.
Reflux with throat symptoms typically results in higher meds.
sk55 makes a good point, it never hurts to get a second opinion.
Have you had an endoscopy done? Or, have you had EN&T check out your throat symptoms?