Anyone else take the mini pill ?

Allie
I'm 8 weeks postpartum had my baby vaginally I got my first period on June 3rd no cramps but really heavy bleeding and now I started again on June 27th it's very, very light mild cramps the first day now none at all. I've been on the mini pill (norethridone) since June 15th. Have no clue why I'm spotting again.