i have taken Postinor -2 last tuesday, i took the first pill four hours after having sex ., I have taken postinor 2 2 times before all those times i got my period on the 6th day of having sex, but this time its been 8 days i still didn t get my period. my normal period is due on the 26th of this month which is 10 days from now. please help me, i am scared of me being pregnant .