My six week old is sick, and I'm wondering if anyone might know what it can be. I'm worried, because he is awfully young to be sick. He has no fever right now, but a few days ago he had a slight cough, and now he's coughing and sneezing and has watery eyes. He has dark green diarrhea and keeps bringing his knees up to his chest (like he's in discomfort). He is crying and crying, it's hard to make him calm down. He'll be sound asleep and wake up screaming. Last night, he couldn't stop for two hours straight. In between crying, he is his normal happy self, cooing and moving around, etc, but then all of a sudden he'll start crying again. I have an appointment for tomorrow morning, but in the meantime, anyone know what it might be? Is it just a cold? Anyone have a baby this young who got sick? I feel like a terrible mother.