Did you eat anything weird before you went to bed? Also ghosts don't mean you any harm, usually they're friendly, so don't judge a book by it's cover. If you continue to experience this, set up a camera or put some powder in a doorway.

You saw it on TV therefore you are drawing conclusions as to why it just happened to be cold. Wouldn't this same air making it colder just happen to roll a ball away?

Whatever you do dont touch or even go near a Ouija board. It will only make things alot lot lot worse and can end up leading to possession and worse.

I highly recommend you get ghostbusters to come sort this shit

Just pray and maybe nothing will get better the first time but keep praying (to Jesus)
Please just try.
freaky stuff happens here too sometimes but when I pray it goes away.
And I know a lot of people are probably going to hate on me but I don't care.
This will help.

Possibly. Today I actually noticed that in my bathroom (right across the hall) the toilet just randomly flushed out of nowhere. Then again I wasnt watching the bathroom when it happened. So my little sister could have done it and than ran away. IDK Im scared!

After I saw turned Celler into my room, I stopped readnig. Good luck man..

I only believe in one ghost, and that's the Holy Ghost. I don't think your experiencing the paranormal, but you are scared and you think there is a ghost in your house, but there is not.

definitely weird and i have heard of the temperature thing before but i also find it hard to believe.