hi,
I am sorry to say but alcohol is bad for pregnant mothers even if its just wine.It can cause a syndrome called FAS in babies and may cause still birth or miscarriages.
You can get more information on it here http://members.aol.com/creaconinc/fas.html
Though the chances of retardation or birth defect in a case as yours is about one in five.But I would ask you to concentrate on the other four chances where no defect has been found.
Keep your mind in a positive frame and avoid all the toxic substances be it caffeine or smoking and try moderate exercising that is permissible.
Eat fresh fruits and vegetables avoid refined food.
Drink lots of water about 10-12 glasses/day.
Practise meditation and suggest your mind that everything is going to be alright.Be positive and may be everything will go well.
Do go for ultra sound and regular checkups as and when required.Hope this has been useful and you are welcome to ask more doubts is any.