I got a Rx for Prenatal... kinda scarey

So is it silly to be scared? Went to meet the new doctor and told her about how we're going to start trying eventually but not right away, well she said babies are like vultures and take everything they can from the mother's body so the earlier I start the better... she said certain things my body will store up so the earlier I start taking prenatals the better... DH said I'll have beautiful hair and nail... me well it's the first time I thought of pregnancy and had a small OMG happen inside of me.