Look, what's done is done, and you can't change it. There is a wide range of possible effects from drinking occasionally during pregnancy--from no measurable effects to serious problems. Hopefully, your baby will be just fine.
You can't keep rolling the dice, though. You know that. I very strongly suggest that you ask your doctor for help with this. Your doctor wants not only for the baby to be healthy, but for you to be in a position to be a good mom to your kids. Your cravings for alcohol is a sign that you most likely are an alcoholic. So it would pay for you to get started with AA or with rehab now. It will be a great gift for yourself and your kids for them to have a sober, healthy mom.