Good day Doctor... My last menstruation was on the 15th of DEC 2016 it lasted for 4days and my stuff is 30 days....... I had unprotected sex with a friend on the 25 and on the 26th till 1st of January I have been having unprotected sex with my fiance. I missed my period for just a day now and I have all signs to show I'm preq.............. Please my question is could it be that my fiancé sperm fertiled my eggs or that of my friend........we are getting married soon.