My 5 1/2 week old was on similac alimentum after getting out the IUC when he was only 22 days old. they found out he had a protein problem. He was the alimentum for weeks. The first week was good then thing went bad. He start projectile throwing his food up 2 time a days which would come through his nose and mouth. It was horrible. The projectile of his food cause his sinus to get bothered and he started having alot of mucus in his throat and nose for 9 days  which was causing him a hard time to breath. Good thing is he hasn't projectile but once since i switched him to nutramigen 4 days ago.He...