I have attacked things and people in my sleep and done things I don't remember doing...?

There have been nights where I woke up and my lamp is knocked iver alog with whatever was sitting next to it. For the past two nights I have slept longer that I wanted to. I set my alarms the night before and when I wake up over an hour later my alarms are turned off. I have no recollection of turning them off. One time I had a sleepover with a couple of my girlfriends and when I woke up my one fried informed me that when she woke up in the middle of the night that she saw my kick my fried who slept eigt next to me. I know it was true because my friend had a pain in her rear where my other friend said I kicked her. I have no idea what is happening. If anyone has any input please let me know I don't want to hurt anyone else wake up late or clean up another mess because I did something and don't remember.