I had a dream that I got raped ???

Well, im 14 years old and im a girl, i had a dream well nightmare last night that my mum went to a different country to visit someone and i was in my own country (ireland) and i was in a car listening to music and then i went into a house and some man came in and got me on the floor and started to rape me, it felt so real, and then the dream progressed onwards and then all of a sudden in the dream i was telling my mum that i was raped, i didn't even understand it at all, i remember feeling very down and depressed in the dream, what does this mean ???????