What one is right?

Mia • My son 10/02/19 🥰🥰 2 angel babies 👼👼

I have my 6 weeks appointment on the 7th, so I know I'll be able to tell then with the doctor. But I have 2 apps both say different things, glow says baby is the size of a chocolate chip and the other app says baby is the size of a sesame seed. Now I dont know about ya'll but I've never seen that big of a sesame seed 😂😂 both say I'm 5 weeks and 5 days though, what one do you think is correct?