No more than 2 weeks, ever. Every time it's more than 5 days late I am terrified that I'm pregnant. Yep, a pregnant virgin I am the next Virgin Mary! Sucks that my mom wouldn't believe that and as soon as baby is born, she send me off to "I don't care where, just get the hell out, and I'm also keeping your baby".
I literally have a negative chance of getting pregnant, not sure why I get scared. Probably hormones xD