I think the main reason for me being nervous this time is that the tooth might be extracted, and the last one I had extracted wasn't pleasant. Had an epinephrine shot (stopped having them after this), went into a full blown panic attack, when I calmed down I was numb for quite a few hours. When they were extracting the tooth, it wasn't using a forceps, more like the dentist shoving my tooth to the left of my mouth (it was my back right first molar) and I almost swallowed it when it popped out.
I'm seriously hoping I don't have to get the tooth extracted, root canal is bearable for me until they put the ring around the tooth, which is painful as all hell.