How To Get Rid Of Pain And Swelling In My Knee?

hi- I fell 6 days ago across the leg of an old, metal chair. It caught me directly in the shin, 4" above ankle height. The pain took my breath away all night, as the swelling increased to that of a baseball. One week later the swelling is still very bad, there is a small cut at the site and the skin is very, very warm. I can't stand or walk very long, and pain is now radiating up into my knee. I have elevated the leg every day, iced it and taken iboprophen, but the pain is getting worse. I am very immunosupressed for my Myasthenia Gravis, and hate to see a Dr. when not necessary... but my leg is not improving at all. Should I call my internist?