My gf had periods on 7 december and it goes till 10-11 december, in 16-17 we had unprotected sex. But within 24 hours she consumed unwanted 72. Later one week she had withdrawal bleeding which was heavy and dark red for 6-7 days approx. But after some times she notice some white discharge in her vagina. Is it any type of pregnancy symptom. Moreover after unprotected sex 7 days later we took a pregnancy test which was negative, then on 11 january again she took a pregnancy test that also was negative. And now her period is overdue. And chances of pregnancy?