I make up weird stories ...?

... in my head. It's been going on for a few years now. They vary but the main gist is a 15 or 16 year old girl gets hurt and/or abused and sometimes raped. They generally get pregnant and keep the baby and become amazing mothers who are really close to their child(ren) but the whole thing is starting to creep me out. I can't really concentrate in school anymore because I get caught up in these stories and sometimes I just lie in bed for hours with this story going on. I don't know what to do. Have I got something seriously wrong with me?