I drink emergency pills and i got a period earlier than i expected but the blood was not much and its brown color then after a week i have a bleeding again and it is last for a week now is it normal?

About those pills...: Plan B, Postinor 2, and other 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. A doctor can evaluate, if having worrisome symptoms.