[usr] I have a dentist appointment next week. I hate going to the dentist. I don't want to go. [sys] I went through that for like 5 years.  Ended up finally going and they've made a lot of advances in comfort since I last went before that. [usr] I have a tooth that has been bothering me and I've already put this off for so long. [qst] [None] [bhv] I'm in a negative mood, please comfort me.
Yeah, you should definitely bite the bullet (metaphorically).  It'll only get worse from here if you don't do anything, and it probably won't be as bad as you worry.
I hate going to the dentist. I have an appointment coming up and I don't want to go. I have a tooth that has been hurting me for awhile and I have already put it off.