Sounds like reflux, all 3 of my boys had it, it's more common in boys for some reason. They would projectile vomit after every feed. They stopped once they were put on cows milk. Looking back now, they are in their 20's, I think it had something to do with the formula. 2 of them were breast fed for the first few weeks and were fine, as soon as they went on the bottle they started being sick, the 3rd son was bottle fed from the start and was sick from then. Health visitor said it was reflux, no one even considered it was possibly the formula.