Help with swelling.?

So, I was hit by a car on the freeway (I was outside of my car at the time) in August of last year. I broke both my legs in 5 places. Yesterday was my first day back to work. When I was done with my shift I went home and my ankles and feet look like tree trunks. I do not have a strenuous job and my legs have never swelled like that before. Why is it doing that and is there anything I can do?