They only way to know for sure is to get an xray, if its broken you'll get pain meds and it just depends on the xray. But for now check her feet for anything stuck to her like a splinter, see if its cut or has any irritation, and also the other foot (there can be something on that one that can tell you if she got into something), if you dont see anything that a visit to the vet would be the best so shes not in any pain. If you do see something let me know?