I really don't think that there is any way you are going to justify any amount of drinking during pregnancy. we are not giving medical advice, but you have to be truthful to your OB-gyn and tell them what you are battling every day. when you drink you endanger your child who cannot defend themselves against what you are putting in your body...they directly absorb the alcohol.
I *think* there is a person on this forum who has a child born with FAS, i'm hoping she is around to post and converse with you...(if i'm correct, i can't remember who it was).
please think before you decide to drink, come here to get support instead.