I ended up returning to the dentist and talking to a staff member about how uncomfortable I was about the whole cavity thing. She showed me my x-rays, and I looked at my tooth in a mirror and they were right, there were really deep grooves in it, it looked different from my other teeth. So I went ahead and had the filling done.
I probably won't go back to that dentist, but at least I won't have to worry about this one tooth. Even if I was nervous some of the time, the fact of the matter is that I'm not a dentist and didn't feel comfortable refuting one.
It bugged me that, the whole time, I really never got to ask the dentist questions. I mean, I know hygenists have a lot of training, but the guy actually drilling my tooth did little more than shake my hand and say hello. But whatever. I lived. Maybe that's how it is these days. My old dentist was careful to ask if I had any questions for him. But they're not all the same.
The wisdom teeth thing is funny. I hadn't thought about it at all before this appointment, but now I'm conscious of it. I have one wisdom tooth. It's on the left side of my top jaw. It's doing just fine, it's in and, I guess, chewing away with the rest of the teeth. I'm not getting rid of it just because it's hard to floss back there. I look at it in the mirror now. Pay special attention to make sure that it gets cleaned. It's my only one, I feel like (and don't think I'm crazy) God gave me this wisdom tooth for a reason (yeah, you think I'm crazy). I'm going to do everything possible to make sure I get to keep it forever.