Hi all. I just finished feeding my 3 week old son, and went to change him. He fell asleep while I was changing his diaper, woke up all of a sudden, and projectile vomited all over himself. He isnt acting sick or anything, and didnt have a temperature. Is this normal for a 3 week old baby to throw up? Do you think he is sick, and if so, is it contagious to me if I give him kisses? Thanks all! I'm a first time mom.