Waiting for the BFP!

Hello all you expecting ladies :) I wanted to get some of ur insight. Ive only ever been 2-3 days late for AF and thats if there is a lot of stress. Im now 4 weeks and 2 days late and everything had been BFN! Wondering if any of u ladies had this and were still pregnant? Were headed to a Halloween party tomorrow and im leary about drinking. Think im good to go or should hold off? Thanks for any advice or sharing your stories :)