irregular menses following hormonal birth control is not unusual but it would be important for you to see your medical provider or women's health clinician in order for you to be properly evaluated especially if delaying pregnancy is important to you. alternative contraception is usually suggested. if you are hoping to achieve more regular predictable menstrual cycles this can also be addressed during your visit.
stopped depo and had a normal period 3 months then stopped for 7 months started regular again 3 months now stopped. on depo i was regular and still had periods every month they were just extremely light. i stopped taking the depo shot in october 2011. i was regular for about three months (lighter than normal but heavier than while on depo) then i had stopped having my period all together. in december 2011 my periods stopped all together. early july 2012 i finally got my period back. i was on a very regular and precise 27 day cycle. the first day of my last period was on september 3rd. i am now 5 days late.