Ack! You're right. I think I was mostly just trying to stay active, and not really focusing on WHAT I was doing to accomplish that. Although I think I may have a new goal to add to the list - to find out whether women (specifically me) can do planches.
I also kind of stopped doing any kind of handstands since my doctor said not to last Thursday. His scientific explanation is that there's nothing wrong with my muscles, but that I "tweaked something in there," whatever that's supposed to mean, and that there's some inflammation in the general area (near my spine?). Thus the prescribed NSAIDs. I'm basically just paying attention to what my back feels like at this point and working based on my own judgment. I'll probably start up again with handstands and sprinting sometime this week if things continue on the right track. I've been doing some gentle running the last couple days just to test what's going on, and it's not causing as much back pain as it did before...although any pain is bad when it comes to your spine, I think.
Try to see a chiro -- if something is "tweaked" then a spinal adjustment may help you.
Planches for women are harder -- but possible from what i hear (though I have yet to see it)