What Causes Severe Pain And Bruising On The Hip?

I fell a couple weeks ago down then stairs, and my hip bruise but I did not think anything of it. I work at a childcare center, so I sit in the floor a lot and sometimes since I fell getting up and down from the floor is nearly impossible from the pain. And now just this past weekend I slipped and fell on ice, took me a bit to get up, I felt like I was fine the next day, but I did not to much moving around. Now 2 days later I find it nearly impossible to move my hip and there is bruising on it as well. I have been putting ice on it to try and help but I am still in a lot of pain.