Had my early scan for our rainbow

Jennifer • Angel baby in my heart 27/01/017 married 01/03 rainbow baby in way EDD 15/12/2018

Saw the heartbeat,

From my lmp i should be 6w6d.. but baby measured 6w1d... having putting that date in google it says my lmp was 15 march... but it wasn't. Im sticking with the 6w6d until my dating scan