crampy- help!

Katie
I'm 9 weeks pp,
Been feeling crampy for 2 weeks or so and still no period.
Wasn't expecting one this soon since I'm BFing.
Any other breastfeeding moms want to share when u got your cycle back?
What did it feel like leading up to it?
Could I still be feeling my uterus shrinking???
Didn't really feel much cramping up until these past few weeks!