Early ultrasound—enlarged uterus??

Amber

I had ultrasound and was reading my findings. It says according to gestational sac I’m in 5th week but uterus is 9 weeks. It’s so confusing. I’m so fearful for miscarriage as I’ve had previous ones but hope I’m just early early.

Any thoughts?

Attaching ultrasound report.

Hcg is 5800; progesterone 10.9 BFP 7/24