Chart stalkers-what day did I ovulate?

[Sammie100]

CD 17 or CD 19?
I'm kinda scratching my head. Apparently so is fertility friend.
I didn't chart my temps as well as I could have prior to the +OPK. My coverline is usually 97.3-97.4.
I've never ovulated as late as CD 19 but my body is known as quite the prankster.

 

[Missbx]

I'd say cd19 x