Baby Chick Sneezing and Runny Nose. PLEASE ANSWER!!!

I have week old chicks that have been doing the regular sneezing because of the dusty bedding, but this morning I noticed one was sneezing more then normal, and also had a runny nose. Is there anything I can do for it? It is my favorite, so I don't want it to die!! Should I seperate it, and give it medication? If so what kind? going to the feed store in an hour, so please answer quickly!!!