I don't belive it. What was your age when these things happend to you? How i said, when you are a little kid or a teenager (average of 10-18 years) you tend to think you hear stepts, voices, random sounds, weird things all this shit but our imagination is making all of these things.
So far nobody proofed that ghosts or spirits or paranormal creatures exist. (Here we don't talk about the Wendigo) I will belive in ghost or paranormal creatures when i see one with my own 2 eyes.