My period ended the 28th of may and i had unprotected sex the 29th and took postinor2, its the 3rd of june now and i am having vaginal bleeding. how l?

Pregnancy worries?: Plan B, Postinor 2, and other brands of emergency contraceptive pills can alter the menstrual cycle bleeding 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.