Nightmare that has scared me - based slightly on my past?

Hell no!! You are not being stupid, so get that out of your head. I think you should talk to a council or have your parents make an appointment with a doctor. Ya know to talk about it. It may be hard, but sometimes letting it out is good. Get people who love you surround you and help you get through things. Alone is not good for you right now. I hope those two (sorry for what i am going to say right now) ******* brats rote in hell and burn slowly. The world isin't over and you are still young, so try your best, you'll make it through.