Hi, I thought I'd post here as you guys are probably the most helpful. I'm 18 and yesterday morning did the 'pullout method' with my boyfriend, no lectures please 
My period is currently 5 days late, however it can't be due to the unprotected sex as obviously that was afterwards. I actually did a test yesterday just to be sure (to check if pregnancy was the reason for the late period, not if I had gotten pregnant yesterday..) and it was negative.
I know getting pregnant is down to your fertility window/ovulation etc however I really know nothing about it, can anyone help me out?
Also I'm guessing I should definitely get the morning after pill, planning on getting it tomorrow, does anyone know where provides it for free? 
Thank you