I got a cavity filled a little over one week ago and my tooth has been in pain ever since. (top back right molar) I have had to take 400 mg of ibuprofen consistently in the morning and at night before bed because of the pain. The tooth was hurting a little before the filling was done and my dentist said that I had a hole in the tooth (I was totally unaware of it). He also showed me the x-ray and it was pretty close to the pulp of my tooth. I have to get a root canal don't I?