AF due 10/8, late OV

AF is scheduled to arrive 10/8. According to my opk, I ovulated on day 16 of cycle (last month, it was earlier in cycle). I did have some glasses of wine at a wedding Friday but now I'm scared to indulge tomorrow, at a team building event. Also, I want to test tomorrow just to see. I can never distinguish clearly between pregnancy and AF symptoms. I guess I could fake it and get a virgin drink, so as not to arouse suspicion. I feel like we timed things pretty well this month.