Bone below knee protruding due to bicycle accident

Patient: I hard bump on my leg just below the knee from a bicycle accident. The bone looks as if it protruding and it is very hard — not soft at all. It appeared as soon as I fell. It has been 2 months. It hurts to kneel and to stretch before I play tennis. I did not seek medical attention since I thought it was just swollen from the fall. Now, I am thinking that I have waited too long and nothing can be done. Any help would be appreciated.

Symptoms: Large bump below knee due to bicycle fall