Wow, sounds like you have been through a lot. I recently started soaking my toothbrush head twice a week in hydrogen peroxide and swishing with a capful of hp and water. It seems to provide some relief. Dentist also suggested swishing with a capful of olive oil before bed. Hope this helps you.

Have you had a scope of your esophagus? After suffering almost 4 years with burning mouth, tooth, and tongue and many medical and dental specialists, a few dental procedures, and allergy testing I finally went to emergency room. That doctor had my burning gone within the hour and recommended an esophagus scope which I got. I was diagnosed with gastritis with hyperplasia, acid and bile reflux, and Barrett’s. Took 2 months of treatment to see results . I follow all on line suggestions for treating reflux and Barrett’s including all lifestyle changes in eating, drinking, and sleeping.

Get an esophagus scope and include the test for acid reflux. I tried many things over a ; year period. Having the scope and treating for both acid and bile reflux is the best thing I have done but took patience and 2 months of treatment to see results The high dose ppi and sucralfate was important to my recovery. Even after 7 months of treatment if I lower my ppi dosage I will start burning.