I generally act as if I'm pregnant, meaning I don't drink, take ibuprofen, things like that...just in case. This last 2WW I had drinks up until 4dpo and then stopped for the rest of the time. Although I know that a drink or two that early on will most likely not matter at all, I just feel like not drinking is the least I can do to provide a potentially healthy beginning. But I also don't think that you or anyone else who participates in banned-when-pregnant behaviors is doing anything wrong. Because let's face it, if we weren't TTC and monitoring our bodies so closely, obsessing over every cramp and twinge and slight variation in body temperature, we would not even know we were pregnant until we were late. And we would have most like done something that we were "not supposed to do" anyway.
And if AF shows up, then it's time for margaritas and hot dogs!!!