I belive i have ghost in my house idnt noe if des has anythin2 do with it?

on some nights i keep the tv on a music channel and on one night i wake up at 3 somthing in the morning and as im laying thier the tv just shuts off but turns back on its still on the music channel but thier is no sound so i just go back to sleep the next morning im getting ready for school but thier still no soundon the tv so i tried to change the channel but the tv said that the card for the dvr wasnt the right one so i thought maybe my mom was messing with me and switched the card with the livingroom so i take both cards out of the dvrs and it kept saying the wrong card for the dvr so i gave up and shut the tv off so then my little sister comes puts one of the cards in the dvr snd the tv starts to work before this happen other strange things have been happing like tapping me touching nd heard stuff move around is thier ghost in my house? wat should i do?