In view of the symptoms, I would recommend that you take a normal X-ray to make sure that you have a sepsis fracture. You also need to prescribe physical therapy exercises to keep your knee steady and help you recover. If necessary, you can also take a C.T. scan to check the level of injuries. Note that this injury does not require a head C.T.
Sir, I fell down the stairs, got a knee injury, my knees are swollen and in pain.