When I had my wisdom teeth out, they were planning on putting me to sleep. They gave me an IV shot of midazolam, then an IV shot of nalbuphine. Then they did one more of each. Then they did one more of each. They realized at this point that I was not going to get put out. They were not aware that I was a drug addict. I didn't feel very fucked up, but I probably was, just not to my standards. They had told me not to take my clonazepam that morning, but I took 4mg anyways. Anyhow, they gave me a bunch of novacaine shots and I couldn't feel anything at all. Not sure how long the surgery lasted, but I do remember laughing my ass off while blood was flying out of my mouth. They took out all 4, 3 of which were impacted, so 7 extractions total. The pain was horrible for almost 2 weeks, but they gave me hydrocodone, codeine, and tramadol.
Anyhow, I wouldn't worry about it, man. Once it's done, it's done, and you're all the better for it, unless you end up with a nasty case of TMJD like I did. Of course, they made me sign papers that said I might end up with TMJD, a drooping face, and possible cut nerves. :-/