I had a long description all typed up, but I just talked to my wife and found that she's been feeling the same way - that today was a weird day, that she was feeling completely out of sorts, that everything was annoying her, that she needed to reset. For me, I've been feeling like everything I do has turned into disaster, been a disappointment to her, etc... and yes, completely out of sorts.
We tried having sex 3 times, the first two ending in frustration due to outside factors.... finally it happened, but sure enough I guess I screwed up the rhythm at just the wrong moment, resulting in her being annoyed and me feeling like a disappointment.
I wish real life was like a video game... get to reset and redo the day.
Some good, though... on my hike this morning I decided to reset my perspective on my wife's current outside relationship. I'll ignore everything that has happened before, because it was colored by other stresses, and focus only on the present. Hopefully this will keep us (me) on a more even keel.