Changed due date!?

Brittany • Wifey to Josh, mommy to Jaxon and Nova 🥰

I may have a stupid question or it may not. FTM. I had my anatomy scan on Friday found out it's a baby boy😍 Anyways I had a call today and my doc said she changed my due date from 9/5 to 8/26 does that mean I went from 17w5d to 19w1d?