Why Do I See Shadows And Hear Voices When There Is No One Around, Especially At Night In A Dark Room?

SO AT NITE WHEN I LAY IN BED IN A PITCH BLACK ROOM WITH NO LIGHTS ON HOW COME I STILL SEE SHADOWS OF PEOPLE LIKE ITS A HOLE NOTHER WORLD GOING ON AROUND ME ALSO THEN THERE IS NO SOUND AROUND MY HOUSE AN MY BOY FRIEND WALKS OUT OF THE ROOM I SWEAR I HERE PEOPLE TALKING AN I AM CONSTALY ASKING HIM WHO IS TALKING TO WHEN THERE IS NO ONE AROUND WHEN I KNOW I HEARD TWO PEOPLE TALKING ON TOP I CANT RUN A FAN HARDLEY CUZ I SWEAR I HEAR SOUNDS OF VIBRATIONS COMING THUR THE FAN WHATS WRONG WITH ME