I did that thing you're not supposed to do when designing. I didn't write down what I was doing as I went along. I thought I would get back to it while I still remembered what I was doing... and I didn't. And I also tell myself I can always go back and count stitches, but I didn't take into account that I'm using very small, very pale thread. Oops. I hit on the solution to scan it and then blow up the picture real big. That helped... a little... maybe.
Later: Hmmm...maybe next time, up the contrast with Photoshop too.