I have a serious question for I friend, I have no clue about the answer lol. It is kinda explicit.

She had a period 15-18, had sex on the 21st, spotted on the 26th. Her period was due on the 9th of may. Still hasn't got a period, no signs of even starting. But has taken 3-4 tests and they're all Negative. This guy she hooked up with was wearing a condom but then took it off and got off on the opening of her vagina, if that makes sense😂 could she still get pregnant that way?