If you really think it may be trying to work into pneumonia ... pick up some the original Sudafed ( aka pseudoephedrine ) or a generic of it to help dry it up... This is what doctors used to prescribe for it ( and also swimmer's ear ). Don't go with the alternate versions except for use before sleep... Of course you'll have to ask for it at the counter and show ID to get it.
It makes a lot of people jittery... so you may also want to ask the pharmacist for an alternate you can use in the evening ( your evening, whenever that is... lol ) and while sleeping. The alternates aren't as good at drying you up... but they probably won't keep you up when trying to sleep