So i took postinor 2 the day after i had sex but i took the two tablets at once.. it is more than a week now and am have vaginal bleeding together with stomach pain like if am having my period.. could i be pregnant????

Maybe, but unlikely: Plan B, Postinor 2, and other brands of emergency contraceptive pills can alter the menstrual cycle for the cycle in which Plan B or Postinor 2 was taken, and sometimes the next month's cycle too. One should be sure to check a home pregnancy test about 3 weeks after sex, because emergency contraceptive pills work most of the time, but not all the time.