I have been coughing for over a month now and three days ago finally saw the doc: Sounds like my symptoms and diagnosis from my Doctor, without him calling it croup. And he also gave me a five day course of Steroids to bring down the inflamation in my throat. This happens to me every couple of years and has been treated with either prednisone or Advair.
I would only see the doc if it has lingered more than a week or two. I would have gone sooner but I was traveling