Can you get photos of her legs and undersides of her feet? It'd be good to definitely rule out any issues with her feet. Feel for heat and swelling in both legs.
I just had this with my girl and it turned out to be sudden and aggressive bumble infection, that could cause green in the poop, so let's rule that out.
If you're concerned about egg issues, the first thing you'll need to do is get some calcium gluconate liquid form (the Durvet brand is popular for this) from TSC, 1ml dose over a treat, or carefully given directly via syringe. Or calcium citrate pills (with vitamin D ideally) 600mg pill for one bird. It could be hidden in a treat, or powdered into a bit of oats with water, something like that. If she won't take it in one dose you'll need to put it in the back of her mouth, to the side, not the middle, very carefully so that she will swallow it. One dose for one day unless she shows further sign of egg trouble. I can give more detailed instructions with a photo for guidance if you're unsure. This doesn't sound like egg binding, but if you're concerned and she's had problems before, it's completely safe to give her calcium to be safe.
It's likely to be a sprain, so what I will suggest is supplementing niacin and preventing her from running about (a crate or small pen). You can add nutritional yeast to her food, 2 tbsp per cup to be safe, or 1tbsp per cup with vitamin B complex (Durvet brand from tractor supply) 1ml over a treat daily.