Periods since giving birth

Amber • Wife. Mommy to 2 on earth and 1 in Heaven.
Does anyone else have super painful periods since having a child? Mine were NEVER like this. I'm 18 months PP this month. sometimes they're so bad I can't get out of bed or can't walk. I see my doc at the end of this month and plan on asking her about it. My mom said it was normal because it happened to her too. Anyone else?