Courtneykay, thank you for telling me! And shubertgoddess, I'll look around.
I actually found what I think really works! I was looking around for more options for helping toothaches and saw the toothpaste sensodyne. Some people insisted that even though it's for sensitive teeth, it can help a toothache too. I thought 'what the heck, I could at least try it'. So I used it to brush my teeth and what do you know, by the time I went to bed the toothache was completely gone. I just woke up, and it's still gone. This is the first time anything I've tried has worked so well. I don't know if it's just a coincidence, like my tooth just decided to stop hurting around then, or if it really worked...but I'm at least glad it's gone. The nausea went with it.