as the others have said, if it's a one-off I think you'll be fine. I got a bit trashed with 2 or 3 of mine before I knew I was PG and then stressed about it being early in their development. Your bub is a bit older, I think a lot of the issues with drinking during PG is when it is prolonged exposure iykwim.
Rest, drink water... chat to your Dr or Midw if you're worried.

Good advice from Brontide...