I'm inclined to say it's possible you Oed but not certain. I think it's possible because of the downward pattern that developed starting on May 6th to the 16th. And that tinny jump on the 14th is a very common thing to see a couple days before O, especially when it's followed by those 2 lower temps. Now you've had that higher, organized arch of temps over the last 5 days... A fairly common thing to see after O.
So yes, it's very possible but I wouldn't bank on this being O. Your temps have been fairly high since you had your boys and they have been really well behaved and collected in patterns several times leading up until now. I think it's more a wait and see type thing at this point.
If you can think back to any SxS you had on the 16th? Cramping, bouts of EWCM,.... Increased sex drive? If you were the one that initiated sex on that day I'd say that chances you were actually Oing at the time are higher too
Be warned, I'll be stalking this one to see how it turns out