If you are 11 weeks pregnant and drank heavily the night before but never drank before or after that did you harm the fetus?

While I am no expert, it is doubtful that you did any major damage to your baby.My OB, suggested drinking 1 beer a day to keep regular.I did, and I have 3 healthy adult sons.
Ask you Doc, don't be afraid to tell him anything,your Physician is there for YOU.