Period question

Hallie • Had an ectopic in November 2015. Baby boy born March 14 2017 & Baby girl born March 19 2020.
I'm on my second postpartum period, and I've been on it for 17 days now, is this normal? I got the depo shot in April, and have never been on birth control before. Could that be why? I have an appointment tomorrow with my gyno, but I'm curious now.