paranoid

I keep hearing voices around me, even though no one's home. 

I heard the television playing but none of the television were even switched on.

I heard someone showering in the toilet but the toilets were empty.

I swear I heard my mum talking outside, so I went out but no one's there.

I keep hearing people walking outside, opening and closing the door.

I don't know to say whether its freaky or not, but it makes me think I'm crazy.