A Disturbing Noise Late At Night

I am writing this story because I am confused of what this is and to this day me and my family have never discovered what it was.

It was around 9:30 and I was upstairs watching an episode of Supernatural with my mum and dad in the pitch black with the blinds open and no light but the street lamps on the street shining through. We were sitting just casually watching it when there was a huge bang clatter noise like a square tv had falling of a shelf of something. Me, my mum, and dad got up and ran to the top of the stairs and shouted on my grandparents to see of they were okay. They said they were fine and heard the noise as well. My dad grabbed a torch and went round the front and back of the house and into the garage to see what had happened. When he came back in there was nothing there he told us.

After a few days passed, when I went to bed I would go cold and keep staring behind me as if someone was watching me I would keep staring around at the floor and scared to turn back. I also heard scratchings on my wooden wardrobes which used to scare me a lot but now I have become used to it and have began to live with it

My mum and dad don't believe in ghosts when I mention them and just say that ghost don't exist but I think this is to make me less worried.

Also there have been occasions were things have went missing and then appeared days or hours later and this scares me.

If anyone has had or is having similar encounters please let me know and please help me find out what is going on