Measuring 2 weeks behind? Look at my pics!

Jennifer

Top pic is 6w/3D bottom pick is 7w/6d. But with the bottom pic doctor said I was only measuring at 6 weeks. To me it looks like the baby has grown! I know my dates are correct so I’m just nervous now. New scan in another week. Anyone have an experience where the doc said you were measuring behind, and things were ok? Heart beat was strong at 118 first US then 158 at second US.