Hello, my 5 week old baby has been vomiting some gross slimy milk for the past couple of days. He doesn t seem too phased by it, but as a new mommy, I am very concerned. He is being fed enfamil gentlease 3 oz. The vomit is very slimy and smells sort of rotten. Also, when this vomiting occurs, it s almost as if he is throwing up the entire contents of what he was just fed.