Drinking alcohol before confirmed pregnant?

It's too early to tell (AF is due July 8th) but I've noticed that my boobs are very sore and I generally feel bloated... Got a bit dizzy dancy (though that could just be my dancing skills) and peeing frequently... So the question is in relation to drinking- friends and family will definitely notice if I'm not drinking... I feel like I shouldn't drink.... But maybe it's ok to just have one? Until I know for sure? What do other ladies do during the wait time? Do you switch to pregnant diet- no sushi or raw cookie dough?!