Hi Inq. I had my upper two wisdom teeth pulled out about a year and a half ago. They had broken through my gumline and my general dentist was able to pull them out in under three seconds, with no problems, with only novaicane. I still have one of my bottom wisdom teeth, but the other one was impacted and I had it extracted by an oral surgeon. The one that I still have is just fine, with no problems, (knock on wood).
As far as IV sedation, it is great. One minute your awake and the next you are out. The next thing you will remember is waking up when it is all over.
I am not to familiar about dry socket, but I do know that not everyone gets it. I am sure your oral surgeon will tell you all about it, before you go home.
As far as the jaw clicking, my sister has TMJ which causes her jaw to click and pop. She also had four wisdom teeth removed and the TMJ didn't complicate the extraction process.
Finally, as for the dental anxiety. If you are getting IV sedation, you will have no clue what is going on. I used to also be very anxious about the dentist. I didn't go for years. Then one day I had pain and had to go. Turns out I had a lot of problems so over the course of two years I had a root canal, a root canal retreatment, gum graphing surgery, crown lengthening, three extractions, oral surgery, post and crown work, and tons of cavities filled. And really none of it was that bad at all. I think the worst part was just sitting in the chair for so long, with nothing to do. Good luck and I am sure that you will be just fine