I went to get a cavity filled about 3 months ago. It was pretty deep, almost to the nerve. It was extremely sensitive for awhile. For the most part, the sensitivity has gone away but when I bite down on something hard like let's say a pretzel, it really hurts. It even hurts when I floss in between the tooth. I never felt any pain or sensitivity until the cavity was filled. I went back to the dentist who then grinded it down a little bit too fix the bite. It did absolutely nothing. She mentioned it could be awhile before everything feels normal but this doesn't feel right. Do I just need to wait it out or is something else wrong here?