I am 21 old girl on 8 oct 2014 my partner put his penis for 8-10 seconds in my vagina not very deep(4 days back I finished with my periods ) ,I took unwanted 72 exactly after 23 hours .Then on 16 October 2014 I got very light bleeding which continued for 7 days . Then on 15 November 2014 I took a pregnancy test at home(used first morning urine ) by the kit which is available at medical stores and the result was negative but till now I haven't got my periods its 29 November 2014.