I had sex in the month of august and i took unwanted 72 within 24 hours and i got my periods for the monrh of august. Then again i had sex in the end of august and i felt that the condom had leaked so again i had to take another unwanted 72 on 1st September. My periods usually last for 6-7 days. I got my periods for September as well as October but it lasted for 3-4 days each, whereas my normal periods used to last for 6 days. I have not got my periods for November and December. I m really worried. Am i pregnant or its just the pills? If so, when am i going to get my periods back? I have not taken any pill since then. Neither have i engaged in any sexual activity.