So I got a thing of formula as a gift and it's the wrong kind. We use Enfamil Lipil with Iron and the one we got was Enfamil with Iron. We are running low on the Lipil kind, and I can't get anymore until morning, would it be ok if I used just the Enfamil with Iron until I can get the lipil? Will it hurt my son? I'd call his ped and ask, but they don't have an after hours office number.