I'm sorry to have to ask you this. I know you focus on children but I am 34 and have had a cough for a couple weeks now. Some improvement but I still have a tickle. I don't smoke and didn't have a fever. Just been a little more tired perhaps from the coughing throughout the day. I tried a pill cough suppressant and expectorant which helps but there always seems to be more stuff to cough up and my voice isn't quite back to normal yet and I can't hit high pitches without serious cracks in my voice. This all seemed to start when I throughly cleaned the bathroom. Is there something going around?
Coughs for a couple weeks that aren't getting better probably need to be evaluated. The vocal cord issues, can't hit the high pitches, suggest a vocal cord issue, probably viral. The exposure to the cleaning products could also have inflamed your airway. If you are feeling otherwise well, no shortness of breath or fever, I would just watch things for a week.
Good luck, Dr. Olson