I read you need to stop drinking alcohol 48 hours before if you don’t regularly drink, but if you usually drink daily then to stop 2 weeks before. I can’t see it making a different if you’re drinking a small amount 11 days before, just don’t overdo it and hydrate lots afterwards to try flush it out of your system 🙂 having said that, I’m no expert and would hate to say this and then it cause issues for you! x