What IS this⁉️

Hey 👋🏽 I miscarried sometime last week as confirmed by blood test & ultrasound. I would’ve been 7 weeks last Friday. I just started heavy bleeding on Sunday night. I’ve had a few “clotty”/tiny strings come out of me, but this is new. I’m just curious what anyone thinks it could be. It looks like a miniature placenta to me 🤷🏽‍♀️ or would the placenta would’ve even been formed/this big by then? Thoughts?