Is there an evil spirit in my room?

Lately I have been kinda scared to go in my room at night when the light is off. No, I'm not afraid of the dark. Its just that whenever I'm in the room trying to sleep I feel like I'm being watched. I never feel like this when I have a friend stay the night and we both sleep in my room. I also never feel like tbis at night in my friends rooms when I'm sleeping over. Just my room. I get this really weird feeling like there is something in my room. Also, did I mention I have bunk beds? Well when I sleep on the bottom bed its worse. Sometimes it feels like some one is sitting in the bed with me. Am I just crazy? Or do you think something evil is in my house? Also, did I mention by dog barked at midair today?