Hello,
I am 26 F. On 13th feb me and my guy got intimate and he inserted his penis for a couple of seconds (hardly 5) then took it out cos we did not have any protection. The very same day, within half an hour my periods started(13th/14th of every month) which continued for 4-5 days and the flow was perfect! I did not take contraceptive cos my periods had started. I am waiting for periods next month but Could I be pregnant?