Last month my boyfriend and I were fooling around and although we didn't have sex exactly, his penis was near to my vagina. I was on antibiotics at the time for a throat infection and and just finished that day. This next morning i took the morning after pill Nerlevo 15mg. A week later i got my period but it only lasted two days and i was wondering could that have been spotting? My periods are fairly irregualar as it is. Could i be pregnant?