I feel on my knee on Saturday and bruised to ankle. Went to er and no break or crack in knee. Not a lot of pain in knee yesterday I hit the same knee getting into car and today walked all day now ankle swollen and red about three inches above ankle on side
Its blunt trauma. No need to worry. You need to take little precautions. Raise feet while on bed by putting pillows. Also, I would not suggest you to take anti-inflammatory med till you can tolerate pain. Simply put some turmeric powder in warm milk or warm water and Chat Doctor.  May also apply turmeric and clarified butter on swollen and bruised site (even if wounded). Do for few days. Its safe and natural anti-inflammatory and bacteriostatic. If pain is intolerable, may take some light anti inflammatory. Turmeric use may still continue. It's vastly used in India. It will help you soon. My wishes.