My one year old son has been vomiting for a while now and I have been addressing it with his pediatrician but it s still going on. I was thinking that maybe it was the milk that he was trying to transition with but I ve been noticing that it doesn t really matter what it is he throws it up....projectile vomiting and sometimes it seems to really hurt him. Sometimes he ll keep it down whether it be food or milk and other times with the same thing he won t. He had problems when he was a little baby after I couldn t produce enough breastmilk and decided to switch to formula until he was on the similac gentle for lactose sensitive babies. He was fine for a while until I had to switch brands to the enfamil gentlease and it started all over again then stopped for a while. When he turned one i started transitioning him to whole milk like i did with my first son. He was fine for about a month then it started again and i decided to go back to the enfamil but it hasn t stopped since then and now he does it even if he just has lucnh or dinner with juice. sometimes he starts coughing until he throws up and others it ll just come out with no warning. Please help...