Due date help

Jay • Mom of three girls 💕 and last baby on the way 💚

So based on my LMP I would be due august 18th. When I went for my first ultrasound I measured two weeks behind at 5 weeks 5 days and due “august 31st”. My second ultrasound I was measuring good and baby had a strong heart beat and measured 6 weeks 6 days with a due date of September 3rd. Doctor hasn’t ever said when I’m due. I know it doesn’t matter much but what would you estimate