The feeling of being watched, I've heard, can be caused by certain electrical wiring and stuff, which is why most people feel watched in basements, atics or old buildings- you're more likely to find open wiring and whatnot there. And most youngsters have experienced the feeling or manifestation of a "presence" in their room- it's not uncommon. I personally, am a Christian, so I don't necesarily believe in ghosts, but I do believe in evil, and evil spirits. I think it's a spiritual thing that you're going through. That might sound crazy, but I'm not saying to get a priest to exorcise your house or anything- I don't know what to think about exorcism, it's kind of freaky. You're probably experiencing night terrors, where you wake up screaming and in fear, and have experiences of the spiritual realm- that generally aren't good (aka, a feeling of being suffocated, etc.) I have a fear of evil in my house too- a lot of times I have nightmares and have to sleep with the light on- it might sound a little over the top for a 19 year old, but I do. So, to answer your question, (finally =) I would say that you aren't being "harassed," you're probably having night terrors, and/or are experiencing spiritual things. Satan will do anything to make you believe there is no afterlife, even if that means getting you to believe there are "ghosts" in your house, and you become a ghost when you die. Once again, it might sound crazy. I'm not going to tell you to chant the spirits away, but you should know that if you're a Christian, you have nothing to fear, and if you aren't a Christian, God doesn't want anything bad to happen to you. If you have a Bible, look up verses about fear, and God's help-that might be comforting. And don't worry! If you're a Christian, the Word of God is the weapon you wield against these kind of things!