You might be suffering from weakness. Wait for some days, if leg pain does not reduce or go away, consult your doctor. It might be a sign of some other under disease or disorder.
I'm sorry to hear this. Is this better? I wouldn't think that fevers would be related to foot pain. Fevers actually serve a really important purpose. They make us feel uncomfortable but it is a response to our body trying to fight off something so we get well. They typically are not dangerous even when high. But . . . since she had a fever, maybe she has some type of infection that is also causing the foot pain. An abscessed sore? A blood infection? Not sure, obviously. So, I'm glad you took her to the doctor. This is the mayo clinic's information on when to see a doctor for foot pain. https://www.mayoclinic.org/symptoms/foot-pain/basics/when-to-see-doctor/sym-20050792
Tell us what the doctor said and I'd love to chat more about this.