For most of the embryo's nutrition, at this point, he is using a yolk sac, instead of the placenta, which will connect him to your bloodstream, and forms after the 8th-11th week, when he'll graduate from an embryo to a fetus. Until then, if you'd consumed a few drinks here and there, they have no placental barrier to cross, and are extremely unlikely to have even been able to reach your baby. Don't worry! Most women don't realize they're pregnant untl around 5 weeks, and none of us are nuns! I had a few glasses of wine before I found out I was pg with my now 16 month old son, and he's perfectly fine! I'm 5 months pg again, and same story, had a little wine during the first few weeks before I found out. I'm not worried, and you shouldn't be either! Not that it's a free pass to drink early in pregnancy, but the first few weeks, the egg and eventually embryo, are more self succificiant, than reliant on your bloodstream for nutritive intake! Congratulations by the way! Hope you have a H&H 9 months!