Go to the doc and get some penicillin or amoxicillan (yeah, can't spell today) ASAP. You probably have strep throat and nothing's going to help it if you don't get meds. It just gets worse and can totally knock you on your ass.
Any other symptoms? Fever? Swollen glands? Look at the back of your throat- are there white spots? If so, definately strep.
I've had strep twice in the past month. I usually get it at least once a year since i was about 5, so i'm a bit of an expert on it
