Period after baby

L
Hi ladies! My LO is about 16 weeks old and EBF. She's started sleeping longer at night, which has spaced out feedings.  I'm taking the mini-pill, but I'm having menstrual-like cramps and other period related symptoms. No AF yet though.  My questions are:
When did your period return? Did you have any warning signs before you started? Was your period different compared to pre-pregnancy?
Would appreciate any insights you have! Thanks!