When did you get your period back?

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Hey ladies,

I still have not gotten my period (not that I'm complaining) just wondering if it is normal for not have gotten it yet? My LO is 8 months old, I am on BC and I am breast feeding. I know that BF and BC can cause it to be delayed but I wasn't sure how much. I'm asking now because I woke up today with some pretty intense cramps but no blood yet.