I posted many times that DGL licorice works just like Zantac and without all the possible side effects. Why don't you give it a try? It helped me recover completely and it's also helping others. It may take a little time though. It took one month for me but I only had GERD for one month.
Dissolve slowly in mouth (it has to be DGL) 20 minutes before you eat anything and at night before going to sleep. Don't drink anything after taking it at night. When eating, drink after you eat.
Sleep on your left side with torso elevated if possible.