Why are they torturing me?

Well Aliens have plagued me for years. But since March, They have begun to terrorize me again. I was sleeping in my room when all of a sudden a light came on outside by bedroom window. I got out of my bed and looked outside my widow, what I saw was a creature with large blue eyes, and pretty slim built. I was frozen with fear, next thing I remember is talking to an invisible voice. I said "Why do you terrorize me like this?" it replied "We are simply trying to help you" I got a burst of anger and started Screaming at the Aliens "Help ME?!!! YOU ARE TORTURING ME!" They said nothing for a while until the silence was finally broken by screams of pain as a felt a needle go into the back of my neck. I blacked out after that and awoke int he morning with a small pool of blood on my pillow. next to my neck. I know that this was no dream, I was scared for my life, and after this I felt into a depression for 6 months of my life. Why are they torturing me??