Help pleaseeee!!

So I had unprotected sex the 8th and 9th of this month and also yesterday and today and AF isn't due until October 3rd. I wasn't in my fertile window on the 8th or 9th but today was my peak day. I've been feeling really weird lately, peeing a lot, nausea, mood swings and nipple soreness the most. Is it possible I'm already pregnant from having sex on the 8th even though my fertile window hadnt started?