With DS#1: i started having either break through bleeding or a very light period at 10ish months when I stopped pumping milk for cereal (still BF 100% of the time) then after a year when I slowly started to wean, it was a little more each month, then after he was completely weaned it was back to its pre-pg period. But everyone is different.
Re: question for those taking mini pill and bf...
I got my 1st period right around 7 weeks postpartum with all 3 babies. I was EBF and on the mini pill.
Karen