i drank alcohol before I knew :(

Hi all - I JUST found out I am pregnant today at 13 dpo. Apparently we conceived while on vacation. We weren't really trying, but are over the moon about it now! The bad news is, we drank A LOT on vacation. I rarely drink otherwise, but we did for two weeks on vacation....which happened to be the two weeks following conception. Now I am terrified that I've damaged my baby without even realizing. Any thoughts or experiences with this???