Dating behind LMP?

Has anyone dated via ultrasound 1week3days behind where you thought you were according to LMP and gone on to have a healthy pregnancy?

According to LMP I should have been 6w5d at my ultrasound but only dated 5w2d and I know generally when I ovulated as I use OPK and cycles are extremely regular!

Freaking out after 2 miscarriages!!!!! 😰