Last month I got my period 4 days earlier than I expected, i got it 2/9 when I should have gotten it 2/12. I always have gotten my period the day before the last period; for example, I got my period 12/14, then 1/13, and it should go backwards. I also started to become sexually active with my bf towards the end of Feb of this year, and has never cum'd inside me, and if I follow my "cycle" I should have gotten my period today, but I haven't. Could it be resetting itself back to the normal cycle, or could I be pregnant?