DS2 is 15 months and has a cough. It sounds like there is some chest congestion when he coughs, but his breathing is fine. He has a slight runny nose, no fever, decreased appetite (but is still eating), drooling, is having trouble sleeping and is sometimes irritable-just not himself. He is also teething, so most of those symptoms can be explained away by that. But last week he was exposed to someone that had strep throat. I have no idea how to tell if he has a sore throat, and I don't think that would explain the cough. Any tips?