So I was on depo for 90 days and then switched over to the pill, I've had my period twice since I've…

So I was on depo for 90 days and then switched over to the pill, I've had my period twice since I've given birth and each period lasted between 13-18 days. It was VERY light but lasted a really long time, is this normal ? I've been trying to get in with my OB but he's booked. Just trying to get some opinions