What could it be and do I need to get it checked out?

A month and a half ago I was working in the yard and I was compacting some dirt by stomping on it with my right foot. The next morning there was a bruise on the outside of my calf by the chin bone close to the knee. This bruise was not sensitive to the touch like it was external, and I don't ever remember hitting it. It feels like it is coming from the inside.Fast forward a month. It has been tender the whole last month periodically, especially after I walk a lot or work a lot or bend my legs a lot. And, the bruising and swelling always return for a couple of days after I do anything with that leg, like yesterday I had my legs bent for a long time while I was staining a piece of furniture. Today the front of my right leg is bruised and sore, right in the same spot by my knee, where the chin bone meets. Is it possible with all that stomping around that I fractured a bone, or is this a case of chin splints? (sp?) I am 32, active, and in good health, 6'2" 185lbs. What do you guys think it might be? Thank you.