hi my last period was on 8th oct .i usually get my period within 28 days interval...this time i expected on 6th nov..but still i didnt get my periods..i took postinor 2 tablet to prevent in the mid of oct...do that delay my period...now my concern is i want to postpone my period till 14th nov..taking postpone tablets do affect pregnancy if i m pregnant by chance..pls help me...