Difference between how far along I am in Glow & Nurture

Ky

So I've reinput the data on <a href="https://play.google.com/store/apps/details?id=com.glow.android.nurture">Nurture</a> several times but it keeps giving me a different result than Glow.

Glow says im 6 weeks and 3 days, <a href="https://play.google.com/store/apps/details?id=com.glow.android.nurture">Nurture</a> says 5 weeks and 3 data. I've tried several other apps and calculators and they are giving me a mixture of both of the same results!

First day of last period was 10/4 with an average cycle of 35 (although it was all over the place from 30 - 37). I never actually knew when I was ovulating so perhaps I just have to wait for my first scan??