When anything happens to my kitties, I find that researching all of the possibilities helps me feel better. That way, I feel more prepared to handle whatever is really wrong. Here are some sites that you might be interested in if you want to do some research:
http://www.2ndchance.info/cough.htm
http://www.vetinfo.com/ccough.html
http://www.catclinic.co.uk/health/cough.htm
http://www.2ndchance.info/cough.htm
http://www.vetinfo.com/ccough.html
http://www.catclinic.co.uk/health/cough.htm