The rocking Chair in the forgotten Family house

"I was exploring an old house that I somehow knew used to belong to my family, though I'd never seen it before. The wallpaper was peeling, and there were framed photos on the walls of people I didn't recognize, but I felt like I should've known them. I kept finding rooms that didn't match the layout. One hallway led to a kitchen that was way too big, then a bedroom with a bed still made up like someone had just left it. I remember thinking I should leave, but I wanted to see what was behind the next door. At the end of the hall there was a small room with a rocking chair facing the wall. When I stepped inside, the chair started moving on its own. I didn't see anyone in it, but I heard humming—soft, like an old lullaby. I woke up before I could turn the chair around, and for a second I could still hear the humming."