Does anyone know how long a tooth can hurt after you get a filling? I had a cavity filled 2 months ago and the tooth still hurts. The dentist told me the cavity was close to the nerve and it could be sensitive for awhile. The tooth has been aching everyday since I got the filling and is sensitive to temperatures. I went back to the dentist a few weeks ago and he took some of the filling off in case it was making my bite off and he said the filling looked okay, but he didn’t take an x-ray. I am worried I am headed for a root canal. Advise anyone?