Ultrasound showing Yolk Sac Only

Karina • 👼🏻👼🏻🤰🏻

This ultrasound was done a few days ago at roughly 5w4d (it says 6w5d on there bc they are going based on my last period but I know the exact day I ovulated)..

Is it normal to only see a yolk sac at 5w4d? They want to see me again for another ultrasound in 2 weeks. I am so worried that there will not be progression. I’ve seen a lot of people already see a fetal pole at this stage and even a heartbeat..