So what happened? Who knows? The theories people have told me through comments are great. I love getting ideas like that. I think the biggest contenders are 1---a cognitive jump that resulted in some brain jumblings and anxiety 2---a low level illness of some kind that she couldn't explain to us, and that didn't have enough obvious outside symptoms for us to see 3---too much chocolate at some point, or other food with caffeine. Maybe she snuck coffee at home or school 4---something small setting her off to start with, and then the crying feeding on itself, and just not being able to get stopped by her.
And what made it better? Again, who knows? Today Tony took her out a few times, which we did yesterday too, but also it was warm enough today so she could run around some in the driveway. She need that time outside, more than most anyone I know. He took her to the grocery store and let her pick out what she wanted to eat, which was pistachio nuts. It seemed like after she ate a bunch of those, things turned around. I looked them up and saw they have lots of B6, copper and manganese, whatever that is, so maybe she needed those nutrients and somehow knew what to pick. Maybe her mind finished processing whatever was bothering it. A bit ago, she said "I'm still happy when I'm crying" We think that's a quote from Yo Gabba Gabba somehow, but she uses quotes to say what she wants, sometimes, and maybe she was trying to tell us she needed the crying for some reason. Again, probably not, but you just don't know with her.
Janey grabbed my camera again today, and when I went to check my pictures, I found a few surprise self-portraits! The first picture is one of those, and the second is one I took of her just now, watching her show and pulling at her eye---two of her favorite activities.