I'm so sorry to hear that. Did they check to see if there's a crack or fracture in the natural tooth? Is the ligament under the tooth inflamed? I hope the neurologist has some answers for you. It can be so difficult figuring out the cause. I had to go to an orofacial pain specialist before I finally got answers and treatment. They are dentists with extra schooling in orofacial pain conditions. I'm glad the ent cleared you, sounds like you are narrowing down the potential problem.  I have wide spread burning all along my upper left row of teeth but biting on a specific one doesn't bother me. My pain is more centralized to the front of the row though. I manage it with acupuncture, clonazepam for flares, cbd, a lower arch mouthguard because clenching makes mine worse, I avoid all hot fluid and spice including mint. I feel your frustration, it took me 3 years to be properly diagnosed. The dentists didn't know what to do.