I had sex on 20 th sept just rub penis to vagina, her vagina was not wet then. But I gave her unwanted 72 within 12 hours, then 27 th he got period or withdrawal bleeding (what should I call it, I don't know) which is 2nd time in sept and previous was 14th sept .and now its 2nd november her periods didn't come yet. But today I have done pregnancy test 2nd nov morning it was negative .and again she tested on 7th nov by prega news pregnancy kit but it was also negative. Is she pregnant? Today is 9th november still she have not her period. please help ?we r both 19 and 16.5 years old. Help.is there any chance of pregnancy?