Confusion over EDD

Alaina

Hey ladies!

My LMP began on March 4th so according to the chart, I’d be due December 9th and be 5 weeks 2 days pregnant, but glow had said my due date was December 15th. My cycles are about 35 days long.

My fiancé was away until March 21st so no chance of conceiving before then, would I still be considered due on the 9th or would it be the 15th?

I’m a little confused because it seems so far along for something I’ve only known about for less than a week 😂 and for the fact that there’s no way we could have conceived before like the 23rd lol.

Opinions?