Sounds like you've already mentioned the problem....maybe it's a nervous condition. When I first got my baby (he was already 1 1/2 yrs old), he threw up quite a bit. (in the house, in the car, on my lap
) Once he got used to "us," riding in the car, living in our house, etc--he stopped. Is it possible that your baby just simply doesn't deal well with schedule/household changes?