Fortunately, I called my mother first, who got me a prompt dentist appointment. She seemed unsurprised I was having tooth problems as I have very ugly teeth and most people don't believe me when I tell them I do brush.
Anyway, the kindly but oddly nervous dentist informed me that what I had was an infection and that he could either give me a root canal and a crown or simply remove the tooth. Since I wasn't spending my own money, I asked for the cheaper route, and I'm now one molar less. Since I have a false front tooth, a molar seemed like small potatoes.
I'm at my mother's house now--she asked me to stay here for some reason--and I have to routinely change the gauze, so I still can't sleep. I've been up since 2pm yesterday. But, gods, it's nice to have the pain gone.
I have infamously bad teeth, but the irony didn't occur to me until later that the book I brought with me to the dentist office was called Alabaster.