Replying to Bed bunk ruined my leg

so ns, for the last couple days i've been staying at a friends house. i ended up having to sleep on the top bunk on a bunk bed. anyways, in the middle of the night last night, during a very deep sleep, i rolled off the bed and fell about 5.5 feet to the floor. the impact woke me right up, but when i tried to stand up i couldn't. something happened to my leg. it took all of my effort to climb back up the ladder to my bed. I hoped that some sleep would help my leg, but the next day (today) it's even worse. I can barely walk on it, sitting is incredibly uncomfortable, and pooping is pretty much impossible.

so guys, what happened to me? how can i fix this?