Any thoughts on when I Ovulated?

So I promised myself I wouldn't temp this time because it causes me to think about TTC all the time. Obviously I caved! Lol Anyway i know the missing Pre-o info is a little detrimental however I'm struggling to pinpoint my exact ovulation. Glow says my fertility window was between CD 6-CD11 but my chart suggests that that I ovulated on CD8. Originally I thought I ovulated on CD10 based on my CM, now I don't know. Smh the point being...I dont know when I should test...btw i have really irregular periods that average 44days
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