Ovulation help

Hi All,

My <a href="https://play.google.com/store/apps/details?id=com.glow.android">Glow app</a> shows that I should have ovulated on the 28th. However, I have been testing since 22nd Jan and haven’t got a + ve OPK!

Not sure if its late or I missed it.

I have used both Clearblue advanced and the home tests.

I do see the Creamy CM but not sure if I have been testing wrongly or missing my fertile week!