Being mean to people in sleep. help.?

I have vivid dreams. in one I was shouting at mum and I said 'it makes me feel like killing people. She was annoying me. then I woke up and I was talking out loud. I heard my flat mate lock his door. I wrote jim a note but I doubt he will believe I was dreaming. I think part of my concsiouse does this on purpose and it scares me . Like I have something evil trying to causes problems for me in my life :/. I did it before and I was dreaming about sharing a flat with another guy and shouted ' I wish I didn't share a flat with u' then I woke up and this guy I actually shared with had heard and I felt so baqd and I doubt they believe me. Now in spouting about feeling like killing someone in my sleep and I think I'm mad :/.