Postpartum period after early labor

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Hi ladies, so it's been 3 weeks since I delivered my baby girl. Even though I didn't need to dilate 10cm , my dr said most likely it was 2-3, I still should wait the 6 weeks just like a full term pregnancy.

I stopped bleeding after 2 weeks and now that it's been just over 3 I'm starting to get period cramps.

Could I be starting my period this early?? The other times I've lost it took 4 weeks and then 7 weeks.