weird chart! I know it's possible to get a + OPK and still not O. I hope your body gets around to it soon. I've been going through something similar. For the past 8 days or so I've had a + or almost + OPK every day. No, I couldn't be pregnant or anything. But, I am BFing and have been under stress, so I think mine is a pretty classic delayed O. I think switching your sleep cycle could be stress enough to mess with O. Especially if you've been sleep deprived. Good luck!
big boy 12.8.07 @ 39+2 7lbs 8oz, 20.5" BFed for 13 months
middle boy 8.12.09 @ 39+4 7lbs 9oz, 21" BFed for 13.5 months
little boy 4.26.11 @ 38+4 6lbs 14oz, 19.5" BFed for 26 months
baby boy 10.25.13 @ 41+0 8lbs 15oz, 21.5"
8.16.12 & 12.16.12
I just re-read your OP. You mentioned flu season. Were you sick? Because that can definitely mess up your cycle. The new sleep schedule could be doing it. I'm tot sure. Waking up early is stressful on my body.
Deb ................. DH Norm
DS Caleb, 13 ...... DS Patrick, 12
DS Isaiah, 8 ......... DS Thomas, 7
DD Cherish, 6....... DD Emily, 7\18\13 ....... Ripple, 17
William, 14 weeks, 4/11/12
Deb- No my kids got it only ( and Richard a little), but I guess maybe even that took a toll on my hormones. For us moms that have a few kids, I know that taking care of sick kids is probably stressful on me, but I am so used to multitasking and being busy that I didn't conciously feel stressed- I kick into gear and just ride the wave, so to speak. But my hormones may have shown me otherwise by this long, strange cycle! Hopefully soon! I usually get achy ovaries before I ovulate and I haven't felt it yet. I think I may lay off the opks until I get that achy feeling because getting +OPKs without O'ing IS starting to stress me out LOL!!
I wish I knew what was going on!
I know when TTC Rourke and Nash I had some CRAZY LONG cycles, too (50+ days). Sometimes our bodies just do that. Your last cycle seems pretty spot on so I wouldn't worry too much. It'll get there! I agree with looking at all your signs and taking a break from OPK's while you watch things.