How can I get over my fear of drugs/IV sedation?

Here's the deal. I'm supposed to get 3 wisdom teeth and my dentist recommended IV sedation and the truth is I'm TERRIFIED. Besides the fact it's a needle (bad enough) I'm scared of being knocked out/amnesia/doped up. I don't agree with drug use (although I would get freezing) and I've never been drunk/high so I'm really scared of what that sort of thing would feel like. I'm also really freaked out about what will happen when I'm out (I'm a totally control freak, busybody, hypochondriac, whatever you wanna call it). However, my parents are dead set against me getting just the local anesthetic (what I wanted). I don't feel comfortable talking to my dentist or an oral surgeon about it because I know they'll feel the same way ("You're acting irrationally", etc). I'm totally afraid of having a panic attack when they're about to give me the IV! I'm between a rock and a (very) hard place. What can I do??? Thank you!