Welcome, ~mleary, happy to have you!
I know it's probably terrible advice, but at the very least it's cogent to the little pub we all frequent: a good shot of whiskey does wonders for clearing mucous, both breaking up the dried mucosa in the sinuses as well as the phlegm in the lungs and throat. The heat also salves the sore throat. I don't recommend it as a regimen but at the very least it can be a nice seat-kicker.
It's cool to have someone in biology here. It'll be fun to read your contributions.
~bartender! Get this man a hot toddy.