You've just described my life from December through February. Every time this year, my allergies act up and I have two persistent things: 1. One nostril is constantly blocked. 2. I cough. All. The. Time. The nostril thing is annoying, but the cough drives me absolutely bonkers. It's caused by sinus drainage, and no amount of allergy medication stops it. People think I've got TB or something, and my wife is constantly asking "Are you O.K?" I feel perfectly fine, except for the fact that I can't stop coughing. Oh, and did I mention I'm a professional singer and music teacher? My professional life grinds to a halt until February, and there's nothing I can do about it.