Thanks to all for the input. Here's an update...
So I took her to the vet on Tuesday. My vet didn't think it was MBD either... she took x-rays and didn't notice any fractures or weakened bone density. Her guess was that it is a sprain. My enclosure doesn't have any abnormally high things to climb on. Maybe it was just one of those freak accidents where she landed wrong or got her foot caught on something.
Anyways we are giving her some kind of liquid asprin to hopefully ease the pain and make the swelling go down. We'll see if this works.
If I have time, I'll post pictures of my gecko's leg. My wife just gave birth yesterday to our first baby... so I'm just a tad bit busy.
I'm driving back and forth from the hospital just to administer the liquid asprin to my other little "baby" (gecko). And now... back to the hospital!