I'm afraid to sleep alone because of ET's?

I know this is a really stupid question, but sometimes i get paranoid of aliens abducting me in the middle of the night but me not remembering about it. By just thinking about it, it makes me cringe. Last night was weird, for some reason...i had a nightmare or a dream i dunno. There was something in my room (a black figure i guess?) It was too blurry to see. I could only make out a huge head and it's body were skinny, but all i could see was all dark figure. I was on my bed and i couldn't move. I could only move my foot, but not my whole body. After that i don't remember anything. Then, i woke up at 6am then. Idk what's wrong with me. I keep waking up at 2am or 3am, then go back to sleep. After, I would wake up in between 5am or 6am for no reason. I just had the urge to open my eyes - i dunno..i can't describe my feelings. what should i do about this? I could sleep with my sisters, but i feel like they're sick with me always sleeping with them in their room. So, i had to force myself to sleep in my own room. But i'm scared...i don't want to wake up in the middle of the night, like 2am fo example. I feel like something's bad is going to happen to me..that's why..im scared sleeping on my own room..can anyone help me please? i wasn't like this before. I used to be sleeping alone a lot and have no problem with it. Until i watch fourth kind and some UFO tv shows that i got aware of ET's and all that. Sorry for writing like a whole paragraph about this, but i really need help about this. I'm only 16 btw, so don't make fun of me pls ;(