Ok, so now we know she was trying to pass an egg.
It's important now that she get some good source of calcium, often a hen being egg bound is missing this. Are you feeding oyster shell? If not, please get some. But even with free choice oyster shell, some hens don't get enough. What you can do, is hard boil some eggs, mash them with the shells on, and feed them back to the hens. Cooked eggs won't hurt them, they'll love them in fact. And that gets some calcium back into them.
Some people use yogurt as well, not sure if that's effective or not, never done it.
Also, you may wish to add some Apple Cider Vinegar to their drinking water (about three tablespoons per gallon), which will assist in the hens absorbing the calcium from the oyster shells.