HcG vs Dating Scan?

Maddy

Hello! I'm really confused about my dates - and so is my doc!

On 10 Aug we thought I was ~6w1d and my HcG levels were +11,000 which matched up.

But 10 days later (20 Aug) I had my dating scan and they said I was only 5w6d.

So either I had really high HcG levels at my last blood test (11,000 at 4w3d) or my dating scan was wrong.

Has anyone else experienced similar?? I have my first OB appt in a couple of weeks but I'm too impatient :)