Anyone else terrified of AF coming?

Samantha • First time mommy due with baby #1 September 2017
I got my BFP 5 days ago, with the lines getting increasingly darker, symptoms coming on strong, no reason to doubt at the point. But my normal AF start date is tomorrow and I can't help but wonder/feel like she is coming. I know it's not good to stress but I am in disbelief that she might not show. coming from a girl who has never once missed a period, I'm just expecting her to greet me in the morning lol