I had 3 cavities filled 3 months ago and one of them (that only had a small cavity) hurts any time I chew on something hard. I get a sharp pain and it's unbearable. It doesn't hurt at all when I clench my teeth or eat soft food, and it doesn't have any sensitivity to hot or cold. I've had the filling shaved down 4 times now and it still hurts when I bite on something hard. My dentist said there may be a crack in the tooth, but he did say the filling looked fine. What are my options? Should I suggest to have the filling redone? I also had 4 fillings on the other side of my mouth done 2 weeks ago and I have the same problem in one of those teeth, which means I can't eat hard food at all because both sides of my mouth have been rendered useless with the sharp pains that comes along. I'm frustrated because neither of these teeth had any pain at all before I had the cavities filled and now I can't chew. My dentist also suggested I use a toothpaste for sensitivity which I have been doing for about 3 weeks now and I think there's a bigger problem since it hasn't help. I don't think a sharp pain should be normal considering I've had white fillings before and never had an issue.