Wth! Freaking GLOW!

Im so confused now. Af was due 4/12. When it didnt show. I canged my setting to "period late" told me I should start on 4/14. So when it didnt show yesterday I said "period late" But glow changed the ovulatuon and fertile days on my chart. So now it looks like I didnt even do th bd an the right days.