I got a bfp yesterday but glow has me at 6 dpo (i know dont trust it)

My lmp was 10/3/18

Positive opk 24/3/18

So that makes me 3w1d

However luma says im 4w1d 🙈

I know i wont know until my scan ill be having early one cause i had mc last year and was told next time im pg they will see me early but im worried the bfp is too soon for how far along i am or something is going to happen. Ive bought cheap test to check af is not due until the 7th april. So im cautious cause is super early

But also ive noticed i need to eat something every two hours cause if i dont i feel sick never usually like that so im always having food near by to snack