Sorry to hear about your duck.
Could you post video of her trying walk so we can get an idea of how bad the limp is? To post a video you'll need to upload to a video platforms like youtube or vimeo, then copy/paste the link here.
It could be Pododermatitis, but it's hard to tell. Did this gradually happhen over time, or was this something that appeared overnight almost like she broke something?
Do you have any NSAID's on hand? Do you actually feel a break in the toe? DMSO gel, can be used on the external surfaces of the wound, to decrease swelling.