Good evening, I took levonelle (morning after pill) on day 11 of my cycle (16th November), within 12 hours of sex (the condom broke). I seemed to get my period on the 21st of November, it lasted 3-4 days which is lighter than normal. My original period would have been due around the 4th of December, should I be worried I'm pregnant, as its almost a week late from my original period date? I seem to be experiencing some very slight nausea the past few days, but bar that no other early pregnancy signs such as tender breasts. Im a 21 year old female. Any help would be greatly appreciated to put my mind at rest..