T.M.
Have they tried changing his formula? Some of my grandkids had the projectile vomiting, they had a sensitive gag reflex and my 8 year old granddaughter can still vomit when she wants. The red in the diaper concerns me I don't know if he was taken to a pediatrician or not, I might take him for another opinion and if you live in KC, the best ER for a baby is Children's Mercy.