dun worry....me and my boy didn't use condom at all, and last time he shoot in when i in the dangerous period, and my period also late around 1 week more, also nothing happened wut...
dun worry, actually period become late will caused by many reason, for example: tesnion will caused period come late....
and somemore, u said u 2 haven't reached 20 years old, right? then mayb ur girl period is not so accurate on that day, so dun worry..nothing will happened......