Why do my siblings hate my house?

I am a 23 year old female. My mom is a crackhead just to put it short none of us came out with crazyness or w/e you call it luckly. So my three siblings (Bonnie, Natasha, Edward) live with me of course which Is great and all because I live in a rather big house. Well since all of my siblings don't like to sleep in different rooms they sometimes sleep with me in my bed. We've been in this house for almost a year now. The first night I heard tapping at my window, I was on my laptop typing to a friend but i though it was a owl so i ignored it. You know what my FIRST mistake was? Pulling up the blind and I saw a bloody hand print. I kind of chuckled nervously and said "Oh my, what a bad joke to play..." Sad thing is I have no neighbors the closets neighbors I have live FAWKIN 6 miles away. Bonnie says she hears footsteps at night then the feeling somebodys watching her. Natasha screams at night usually around 12:30-2:30 pm. She hears singing at night scares me. Edward's my oldest younger sibling he's 17 and he says we GOTTA move out. What to do? Is my house haunted? Or is this some cruel joke?