Ultrasound accuracy

Cait • Expecting 🌈 June 2020 after 👼🏻 4/10/19 (20w5d, TFMR)

Just had my first ultrasound - transvag. I’m measuring a week later than I thought I was, and 3 weeks later than last period date would indicate. Has anyone had a lot of fluctuations in EDD??

Here is the nugget at estimated 8w4d!