What’s the Quickest Way to Beat a Cold?

Halloween is 2 days away, and suddenly last night I got hit with a constant runny nose. I don't feel bad, no headache, or any body aches. But I sound stuffed up even though I can't stop my nose from running. I have taken a few over the counter pills with minimal success so far.

I really want to enjoy this Halloween without having to wipe my nose every two minutes.

Do you have any suggestions to beat a sinus problem, quickly?