I have seen a case of someone who was pregnant and still menstruated for three months. It is weird thinking of infection but she might have a reason, what if she took prevention and was too sure about it?
Sex education is different for everyone and to be honest, pregnancy should come to her mind first.
yeah... That what i am saying. though most young people lack sex education but they should know that once you start having sex as a lady and you dont see your period, the first thing to do is pregnancy test. She was just to innocent to know