I've been drinking throughout my entire pregnancy and have escaped censure. However, I don't look pregnant yet, so this may be why. I've had about 10 units over 19 weeks, never more than 1.5 units at a time (basically, a 125 ml glass of champagne).
The new guidance issued yesterday has freaked me out a bit though and I'm not really enjoying the drinks as much as I used to, so I think I'm not going to bother from now on, despite sensible consumption being OK.
I'll wait until I can express and then get battered on lager at the football, like the old days!