I Ran Into The Point Of A Chair And Hit

I ran into the point of a chair and hit my right tibia. It was painful but nothing I addressed. when I got up to walk after an hour or so I noticed my pant leg was tight and rested my hand over my leg and found substantial swelling and tenderness. After icing for a quite awhile and keeping my leg up, and 2 days later, the swelling has decreased, the area is still slightly swollen and very tender. It hurts. Is there something I should do, should I be concerned about clotting, there is no bruising. Thank you.