Limped around a bit, and discovered that even putting my weight on it hurt like the devil as well, so I decided not to go into work today, as my job involves mainly standing up, walking around a small area for about seven of the eight hours involved.
Naturally enough, now it's starting to feel better. I'm not sure just how much of that is due to being off my feet for the last couple of hours, or whether it is actually getting better. Choices, choices....