Ok, so I woke up about 30 minutes ago because of this nightmarish dream I had:

I Start off talking to my sister(I don’t know what about, I can't remember) and then all of a sudden the next thing I know she's got me on the ground and she's choking me close to death( she is a pretty hefty girl so in the dream I struggled but I couldn’t do anything cause she was on top of me),and the scary thing is that I when I woke up my thought felt tight and sore like someone had their hands about it. Then before I have the urge to pass out she stops. (a little background info: me and my sister sometimes get into fights, but nothing so serious as fist fight or anything violent, so this scares me because it's so out of character.) So she stops and then walks off. Later in the dream she is in the computer room at my parents house typing away to one of her friends on the computer and I’m standing behind her. she pushes her wheely chair back fast and hard and wedges me between the table that’s behind me and her chair and she starts assaulting me again, but this time I’m able to pull her hair. the suddenly my dad calls my name and I turn and he's standing next to the front door with my annual grade from band(back from when I was in high school)......not my report card, just a sheet of paper that stated my band grade.

then I woke up
I don’t know exactly what all this craziness could mean, but I would like some help. thanks to whoever can

Stephanie