My girlfriend was with me on 23rd December. We did not have sex, but touched each others genitals. I did not ejaculate, but maybe precum was present on my finger and then I fingered her. I am not sure. It was the last week of her menstrual cycle as her normal cycle should start on 25-26th December. After 36 hours of that incident she took postinor 2 (1.5 mg levonorgestrel, 1 tablet after 36 hours and another after 12 hours of taking the first one). Now the problem is, her period has not come yet. And its 29th December, which should come 25/26th. Is it normal? How long the period is delayed for postinor 2? She is in serious stress for not having period on time. How much time should we wait for pregnancy test?