Due date change?!

Nelly • 🐼 Nelly 🐼: IVF#1: 3 Failed FET.||IUI #1: MMC @ 9wks.💔|| IUI #2&3: Neg.|| IVF#2: Nov 2020; FET#4: 1/28/21-💕Born 9/21/21 ✨🍀✨💛✨🙏🏽✨🍍✨🙌🏽✨🌈✨

I went in for my first ultrasound today and I REALLY thought I was 7 weeks. But! The doctor tells me I’m 6w5d?? It’s not that off, but I was going off of my last period. Anyone have a due date change?!