Caps on teeth and pain?

When I had my wisdom teeth extracted I had laughing gas as well as Novocaine... maybe eight shots of it and still felt parts of the extraction. It was a horrible experience and worsened my fear of the dentist a bit more. I am getting caps on my front teeth and am terrified about the pain. How bad is the pain and what kind of pain is it? How much Novocaine did you get with this level of pain?