Please help! Was she wrong?

Jasmine • Live, Love, Laugh 💕

Had a early ultrasound today and the tech said I’m measuring 5 weeks exactly. When based of my LMP I should be 5+5 or 6 weeks. I’m in a Facebook group and other ladies are posting theirs and mine looks the exact same as theirs at 5+5 not 5 weeks. Was she wrong??