I drank alcohol before i knew i was pregnant
Don't stress out about it!
Many of us did things that are not recommended during pregnancy before we found out that we were pregnant. Most of the time it is harmless and your baby will not suffer any side effects. Let your doctor know how often and how much you drank just in case and to help ease your fears.
Just be sure that going forward you refrain from drinking alcohol until after delivery. And don't worry!