I am a 49 yr old woman. Three days ago, I accidentally banged my leg just above the knee. That evening, it became very warm and began to swell. I've been icing and elevating it, and using 800 mg Advil, but it's still swollen above the knee as well as to the inside of the kneecap. It isn't terribly sore except for after I've been walking (I still need to do certain things!) and it swells more. Do I need to see a doctor at this point, or just continue what I've been doing, or add heat therapy?