question: Hello doctor,I went to the dentist three weeks ago and had some pain in my top molar and there turned out to be a cavity which I had filled and fixed but a few days later I started to feel the same pain in the tooth and went back to the dentist and he said he could not find anything wrong. I have this flap feeling on the top tooth and it is causing discomfort and pain to that area but nobody can tell me what is wrong with it. I think I may have a crack or some type of nerve ending there and it is really bothering me.