I don't think this has to mean you were abused. Maybe you can try thinking about something really pleasant before you go to bed. One thing is for sure that if you go to be thinking that you might have that dream, or hoping not to have that dream; you just might have that dream.
What ever we think about the most especially before bedtime is probably going to be in our dream. Please take my opinion with a grain of salt. I am not a doctor but this is just what I think.
Some say that if you could know in your dream that you are dreaming you can touch something with your hand like the ground and ask what this dream means.