What's wrong with me? Am I mental or something?

Well ok, My imagination is well, really bizzare in science we were talking about ice and matter and I just started daydreaming about being a penguin and having a husband and two children, We had to board Noah's Ark, but I had to smuggle my kids on...Weird huh? Ok here's another my friend was talking to me about this guy she liked and I just went into this fanesy where my prince road up to me on a hoarse and gave me a shovel...weird huh...So why do i constantly go into these bizzare fantasys? Well accualy not all my day dreams are fun. some are scary, like I'm in a house all alone then Suddenly all the lights go out, then I hear a scream, and That scream was mine. Sometimes I accually "Expirence" these day dreams Like I fall asleep when I'm walking, and start talking, about my "Dreams" And sometimes I even sleep walk, I fidget alot. Once I was wide awake and I had a freaky "Dream" and When I stepped back into reality I was well screaming. So what's wrong with me?