I went to the dentist for the first time and he filled cavities that I had. Now, about a month later, one of my teeth that he filled a cavity in hurts. It will throb. When I suck in cold air, it hurts. I also noticed that my bite is off. Do you think that my problems will be solved if I just shaved down the filling to correct the bite? Could it be something else that is causing the pain? could it be that my cavity turned into needing a root canal? The cavity he said was medium sized.