It's weird, I've had a very light cold that hangs on a bit, (A few weeks easily), but a girl I work with got what looked like a bad cold and 2 days later she was perfectly fine. Really she looked like she was over it the very next day. Good luck Bydo!
I'm 3 for 3 this year so far in knocking out colds/sore throats before they really take hold - tons of vitamin C, A, D, oregano oil, etc. Let's see if I can make it 4 for 4.