Drinking?

Hi all! This is the first month that my husband and I have started TTC. I'm 13 days until my next period. My question is about drinking. Lol 😜 I have a girls weekend planned next weekend July 22-23(weekend before my period)...would it be okay to drink or probably not? We aren't wanting people to know we are really TTC yet since it's the first month and I know if I don't drink that weekend I will get questioned about it haha but I don't want it to harm anything in case I might be pregnant. Any advice would be great! 😊