Snip a piece off and see if it bleeds much.
You're gonna need to make time. This sort of thing most often does not spontaneously resolve. If you start running a fever, see your MD immediately.
Toughchick is right, it could be strep. You need to go to the doctor and have it swabbed.
It might be strep throat and the white spots are a sign of infection.
Get some antibiotics from your doctor.
Could be Oral Thrush