I understand both your desire to protect your unborn child from fetal alcohol syndrome, and to recieve Jesus under both species. And thanks be to Jesus, you have a couple of options!

Firstly, the Church pronouced a while back (don’t remember when or what document, but can look it up if you would like) that in receiving the Body of Christ, one is receiving Him, Body, Blood, Soul and Divinity. (One little Host contains all that! What an amazing mystery!

) So, while you may not choose to receive the Our Lord under the species of the Precious Blood, you and your baby are nevertheless receiving the “beautiful blessing of the Blood of the Lamb” (love the way you put that!).
Also, if you really want to receive Our Lord under both species, the tiny dab that you receive once a week is 99.99999999999% (really, completely) UNlikely to affect your baby in any way.
So, no worries!
Also, intinction (the practice of dipping the Host into the Precious Blood) is not allowed by the laity in the Roman Rite as far as I know. If you think about it though, one would really be receiving very close to the same amount whether one receives with intinction, or just by drinking from the Cup.
Also, (last “also”, I promise

) while your parents may in good faith believe they are receiving the Body and Blood of Our Lord at their Episcopalian Church, they, in Truth, are not. I’m sure you already know this, but I couldn’t let it go by. Sorry to nit pick!