Getting periods every 2 weeks

El

I've been breastfeeding for 4.5 months and ever since I was 7 weeks postpartum I've been getting my period every two weeks. I take the mini pill too

Is this unusual? I keep reading that breastfeeding mums don't get their period that often. I'm usually feeding her every 2-3 hours during the day and she only has one 5-6 hour sleep at night