It started just a few hours ago, but it's driving me crazy. The entire left side of my mouth, top and bottom are super-sensitive and THROBBING- at first it was just in my front teeth on top, now I feel it all along the top and bottom on the entire left side of my mouth.

On top of the throbbing tooth pain, I have a severe throbbing headache and neck pain-

Took Bayer asprin about 20 min ago and it's starting to subside... any idea what could be going on? I know I have a couple of cavities that I'm scheduled to have filled on that side, but they never bothered me before... and now w/the headache and neckpain, I'm wondering if it could be anything else?

Thanks for any input!