A case of infant formula was mysteriously delivered to me today?

Fed Ex dropped off this heavy case of Enfamil Infant Formula milk replacement from some company called Mead Johnson in IN. It was addressed to me with my name but no invoice or explanation and I never ordered anything. Anyone else have a "mystery gift" like this appear or know where it could be from??? Could it be from the center that did my 3D ultrasound where I entered a drawing?? I have no clue and trying to figure out where this came from and why! I'm only 23 weeks pregnant so no baby yet to feed...