The novacaine from the root canal has worn off.
The good news is the dentist was great and I didn't feel any pain at all during the procedure. But they warned me that there'd be soreness once the anesthetic wore off, and they weren't kidding.
Come on, NSAIDs. Do your stuff. Not looking forward to the next few days if this level of discomfort keeps up for any length of time.
I just keep reminding myself that there are a lot worse things in the world to deal with. But tooth pain still sux.