ChaosStar

Every now and then I lash out in my sleep, kicking and sometimes punching or hitting my fiance. He knows I don't mean to hurt him and after he yelps and wakes both of us up, we go back to sleep with no worries.
Last night, though, I was dreaming about my sister (who's done some pretty awful things to me) and in my sleep I grew extremely upset. I felt and knew I was angry, and I remember both in my dream and outside of it (if that makes sense) reaching my foot out and digging my toenails into his leg and scratching halfway up it. It wasn't like the other times when I simply lashed out in my sleep, not knowing what I was doing. At the time, I thought he was my sister. I am one of the most pacifist people you could meet, and I'm not sure if last night's actions could be classified as a psychological issue (repressed feelings or anger and all) or a sleep disorder. (I stayed awake at least an hour after that, worrying about what I had done)
I'm terrified that it will happen again... I hate knowing that I hurt him, whether conscious or not.

Any suggestions would be much appreciated.