My last period was march 7 n ended on march 13 my cycles are normal and regulr my boyfriend and I had unprotected sex on the last day of my period and for the following to weeks I haven't had my period yet I have super sore breast fatigue nausea and cramps but not like the kind I usually get before my period these are a bit sharper and last about 2 seconds I began to notice brown spotting 2 days after my missed period could this be a sign!:confused: