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Thanks for using JustAnswer. Hello Dr. Cliff here. Are you available?
Sorry to hear you are having such a problem. It sounds like you have given this enough time to see if it is going to calm down. It may be time to think about getting that root canal to end your problems. The nerve in the tooth may be dying. The deeper a filling is placed, the more of a chance the nerve is affected. The nerve may have already been dying before the filling and crown was placed. Now that the tooth is fixed, the tooth may be reacting to the filling. The way it sounds this is not going away soon. You should not have to be in pain for 3 months seeing if it is going to work. Evidently if you are still getting those sharp shooting pains today it is time for the root canal. Best of Luck! Dr. Cliff