I had an abcessed tooth back in August and one night it was causing me extreme pain. I took something to relieve it and managed to get to sleep. I woke up the next day with a severely swollen lower right jaw. It looked as though I had been clubbed upside the head. I had to go to the ER because I heard from several people that it can be fatal due to the infection being close to your brain (or so they said anyway).
The only solution for me was to have a dentist pull it. It had been rotting away over time so there wasn't much worth saving. Perhaps your situation is better than mine was.