Dude, smoke up.
I garantee that you'll feel better.
Fuck your sore throat, man.
I had such a bad case of pharangitis once I couldn't talk at all except at a volume just above a hushed whisper.
I smoked. I got better.
If you smoke and then meditate on the ailment -- "breath into" and concentrate your whole being on your ailment -- it'll go away even faster.
To really knock the cold out of your system -- and in a day or less -- go to the supermarket, or have your friend go to the supermarket, and pick up some ginger from the produce section. It HAS TO be raw ginger and not that dried, sugar-coated candy shit. Cut 12 slices the width of a penny. Munch on two of them, and swallow only when your tongue can no longer bare the spiciness; the other 10 slices throw in 2 cups of water. Bring to a boil and boil for 10-15 minutes. Add honey and drink.
You do this, you'll never have a cold for more than a day ever again. I say this from experience!
(Whatever you do, don't smoke tobacco! It depleates your body's store of Vitimin C.)