Help me pin down when O day was!

[PrincessMarle]

I'm having a weird month. I think I got a bad batch of Wondfos, and also I can't tell when ovulation was. I need to know which day to stop progesterone cream if I don't get a positive, so pinning down O day is super important for me, as I want to maintain a specific LP. If I don't stop taking the cream, I don't get a period, so I control LP most of the time (last month I didn't, but that's a whole other story!). Take a look and tell me what you ladies think... (ignore the coverlines and egg drops, I basically manually entered those since the software wouldn't!)