1st ultrasound, different due date?

Charlotte • 💍2016 💙2008 💜2010 💙Aug '19🛩️Air Force wife.

I just had my first ultrasound and she said my due date will be different. I calculated everything and so did the midwife, we both came to the due date of August 26th. But the ultrasound technician said something else. Did this ever happen to you and what date did you end up with? Did you go back to your original date after measurements at your new ultrasound or did your little one keep the new due date?