I read this New York Times piece about gargling salt water to help with cold symptoms in the winter.
So low and behold, after a night of beer and wine, Saturday morning I woke up with a sore throat. It was about 4:00 in the morning. I stumbled in to the kitchen to fix myself a saline high ball and gargled it.
I had never done this before, and the salt made me gag, but holy shit it worked well. It is by far the best thing I had ever done for a sore throat.
Give it a try.