i'm sure that plenty of women out there have had a few nights out without realising that they are pregnant. alcohol affects foetuses when it is a sustained, heavy intake - leading to some developmental, physical and psychological problems, but i'm sure if you had a couple of nights out that this won't affect you or the baby in this way. now that you know, all you can do is be sensible and not drink any more and things will turn out ok. try not to worry and if you can't get it out of your mind, next time you see your gp or a midwife, tralk to them about it. good luck!