I do not know if it's just sore from falling on it or fractured or if I bruised the bone. Are there any physical signs I can look for?

Fractures. have significant pain, deformity and loss of function. Strains are sore, you can have bruising and the limb can be stiff. If it is a fx the limb can be stabilized by a splint or Cast initially. An X-ray can confirm if there is a fracture and permanent treatment can be either casting, splinting or surgery depending on the fracture. Sprains are treated with rest, ICE and Nsaids.