Am very worried. From two days my 6 mo old has the cold and congestion and yes I know is nursing very little and with difficulty. Today his diaper is hardly filled with pee and in the last 6 hours - has peed just once. His eyes are tearing up and otherwise he is acting very normal (for an infant with a cold) but am worried about dehydration. What should I do? Call his doctor or take him to emergency?