Hello Dr,in july this year i saw my period 1st week of the month,had sex with my ex bf on the 13th ands i took a postinor2 i bled on the 20th for 2days.Missed my period August,did a blood and urine test,it came out negative.Sept 2nd,my period came and i had unprotected sex on the 11th,took a contraceptive called postinor2 and i have not bled(virginal bleedin that last for 2/3days wen u take postinor2)and it is gonna make it 2weeks i took the postinor2.I wanna know if i may be pregnant or am i safe.