DS has a had a cough for about a month now. It started with a cold we all had and it's just not going away.
Most of the time he's OK, but if he gets cold (after a bath/ if he kicks of his blankets at night/etc) he ends up coughing up a lung.
It was really wet to begin with, now it's usually a dry bark. I noticed today that he seems to breathing like he's been running even after he's been sitting down concentrating on something for a few minutes.

Could his cold have triggered asthma, does it sound like asthma? I had it very mildly as a child.

I know coughs can hang around for a while but how long should I let this go on for?