QUICK QUESTION

Cierra

So based on my last AF (5/30) today I'd be 8 weeks and 4 days. But when I went for my first ultrasound the technician told me I was actually 4 days earlier than I though. Which means when I thought I was 6 weeks and 3 days , I was only 5 weeks and 6 days.

My question is do I go from the date the technician says or from my last AF?!