NO, I don't think it's bad or anything. I go through the same problem. I can't walk past mirrors in the dark. I can't be in a totally dark hallway or house. I can't look at any kind of reflection at night. So, I think it's pretty much normal.it's not really a paranoia. And the nightmares could be a subconscious manifestation of an underlying fear, or just your imagination at work. I suffered through the same nightmare ever since I was in middle school. It got to be so bad to where I would have it every night. It's died down quite a bit, but it still visits me every once in a while.
So don't worry about it. It seems pretty normal to me.
Hey don't worry, it's just an over-active imagination. I'm the same, soon as I step out into the dark I suddenly imagine some creepy-ass figure standing in a doorway. You just have to remember it isn't real!
It could be stress, or the fact that you've been having bad dreams lately. Could be both. But my guess is stress, since I've been through the same thing on several occasions, and I know that feeling all too well. Maybe you need to see a therapist about it? It helped me alot, maybe it would help you as well.
I've lived with my sister as well. It sucked balls. (She has seven kids... at the time she had five... it was a nightmare.) Thank Heavens I don't live there anymore. Maybe you could talk to your sister about it? Maybe come with a solution together and work it out?
you might be a little overly paranoid at this time. I have had really bad bouts of paranoia, usually with thinking I'm sick, lol. It's does usually have to do with something like stress, or maybe something that happened recently, even if it didn't happen to you, but someone you may know, it can have an affect on you. That happened to me last year with something very bad happening to one of my roommates. She didn't really deal with it as she should have, kind of blocked it out, but I had some major panic attacks over it just because it happened to someone I knew.
Maybe the stress of dealing with so many people around you, or something else happening in your life is bringing something up and making you paranoid. I'd suggest maybe talking it out with a close friend or even a Councillor if you think that may help. If you don't want that, maybe just try to calm yourself or come up with something that will occupy your time so you don't focus on it. Sometimes if I have a nightmare or I have trouble sleeping I think of one of the stories I'm working on and try to flesh it out and go through it and that usually helps me.