Hello justin ;
welcome to HealthcareMagic
If you had unprotected sex and if your girl friend has taken Nordett 4 with in 12 hours and next 4 in another 12 hours then the chances of getting pregnant are almost nil.The delay in periods can happen in females due to hormonal
imbalance and here your girlfriend has taken excess hormone in form of Nordett so once the blood level of hormone is reduced she will have her periods in next 3-4 days and if she does not get them please consult a doctor.Next time if you have sex use protection and if you have sex more than 1 times in a month and want to have without protection then tell her to use Nordett as a daily contraceptive
pill.This will avoid pregnancy
as well as maintain her cycles regular.