Hi there, I'm 18 and I've smoked occasionally off and on for about a year (around a pack every few weeks. I'd smoke the pack in a few days but not buy more.) And I came down with a cold/flu that was pretty severe. Idiotically, I continued smoking during the cold and a while after that. And I've been coughing (productive cough, usually clear/white) for MONTHS now. It won't go away. I'm getting kind of scared. I've never really had this problem before and I can't figure out what's causing it. I've taken sudafed for it and it's not been affective. It's starting to get warm so I think the pollen is making it worse. Any suggestions?