I know exactly how you feel and it is very frustrating!

I had the TWW during christmas with my DD and had a few drinks, only one or two, when the gatherings happened. Just before my period was due I convinced myself that we hadn't been successfull (due to the many HPT I had done - too early of course) and had a few too many drinks. The next morning my hang over seemed to be worse than it should have and I did another HPT and got a BFP! DD is now a very happy and healthy 5yo so it doesn't seem to have done her any harm.

Also I heard that they aren't sharing our blood supply at that stage so it isn't affecting them but i'm not sure... But when I had to go to a family wedding a few weeks ago before we told the family the waiters made up mixtures of lime cordial and soda water which looks exactly like champers, and it kept me hydrated for the night. That could be an alternative...

Good luck with the wait and lots of vibes for you!