Postpartum period

Kimberly🚮🚮😘 • Momma to Orion, Taurus, opinionated (sorry)
My first period started Tuesday. I started my birth control exactly one week before that, since my doctor said it was fine to start it that day. I'm still bleeding pretty heavily. I'm on Errin, it's a progestin pill. It doesn't have a week where the pills are sugar pills, all 28 are the same. Is this normal for the first period? I'm also breastfeeding and pumping.