M.C.
Are you breastfeeding? if so, keep it up. If not, switch to soy. and avoid all dairy. My baby was the same way. She would get sick a lot because big sister brought everything home from preschool, and every time she got sick, it ended up in her chest. When I started cutting out the dairy, she got better much faster and the puking, while still present, was not EVERY TIME she ate. Do the hot shower treatment - stand with her in a hot shower until the water runs out to get her to breathe moist air, give her lots of fluids, vics vaporub, etc. Good luck!