No problem, and I feel ya on the needles thing. I can't stand needles. I'm terrified of em. The only two bigtime fears I have in this world (seriously) are needles and sharks. Guess which one I'm more likely to encounter...
Anyhow, if you can get over the initial stick, you shouldn't feel a thing at all. You'll just wake up and notice your wisdom teeth aren't bugging you anymore.
I had hell with mine for years before I got em yanked. They'd surface and push through (causing me a LOT of pain), then they'd go back down into my gums. Up and down, up and down, driving me nuts! Once you finally get em out they won't bug you anymore.
Best of luck to you, and don't sweat it too much. Especially if you're gonna be knocked out... Brother you won't feel a thing. A word of advice - drink some OJ before you go if at all possible. It's rule #1 for "needle freakout". Helps with tattoos too. Have whoever's driving you there stop and let you get a bottle. Trust me on this, it's worth it. Take an MP3 player or your phone and some earbuds. Listen to something relaxing while they stick ya. You should be aight.
So, what knife will you be carrying for one of the dental assistants to walk off with?! Lol