Put hydrogen peroxide on it immediately. It'll hurt but do it.

My best friends son-in law is in the hospital with a hospital acquired flesh eating staph infection... in his face... and the symptoms sound a lot like that, especially the flu like symptoms.

This kid is only 23 years old, with a brand new baby son, and he was absolutely beautiful, stunning good looks, and now he may lose half his face.

Keep it really clean and get yourself an INFECTIOUS DISEASE SPECIALIST asap. Dentists are real morons when it comes to infections. Wasting your time with a dentist when you have an infection may cost you dearly. Take a look at it in the mirror if possible, and if you see any black color or blue/purple run as fast as you can to the nearest specialist.