You sound a lot like me. I took PPIs for several months and started feeling worse-stomach cramps, nausea, agitation, pain in face and burning. Now I take ranitidine, Gaviscon after meals and Pepto Bismol for nausea and indigestion.
I just added acidophilus and might try digestive enzymes.. I still have the mucous, the bad taste and throat clearing but it's better than all the extra stomach stuff. My throat symptoms are worse at night even though I sleep practically sitting up. I always feel worse after eating unless I take the Gaviscon. I don't think everyone can take PPIs.
Good luck finding the right combination to take to help you.