I Tripped Down Stairs, Missing The Last 6 Steps And

I tripped down stairs, missing the last 6 steps and falling directly onto my knees and shins. It was a concrete platform. I immediately had swelling and burning, but shook it off, and took some ibuprofen.
Now a week later, I still have swelling and bruising on both kneecaps and shins. I also have 2 lumps on both kneecaps. I've noticed that the swelling in starting to move into my ankles now. At night, I've noticed that my legs feel very hot, and uncomfortable.