Did I Witness A Murder?

This event took place during the winter time of 2011. I was 16 and I was at home alone. I absolutely hate being alone in my house because it is 100 years old. I always have this fear that I am being watched as I walk out my door. The morning was fine and it was time to catch the bus so I walked out of the house and headed down the driveway to catch the bus.

As I was walking, I passed the tree in my yard. As soon as I passed this tree I sensed something wasn't right; an instant fear entered me and I felt like someone was behind me. I heard footsteps running behind me and I just knew I had to run or I would die. I didn't know why I felt that but I took off running. Then these pictures, I guess you would call it, filled my mind.

I was seeing a girl, a blonde girl my age running for her life. She and I were moving in unison. I saw a black shape, more like a man, chase me out of the corner of my eye. I ran and ran as fast as I could but I couldn't out run him. I knew I was going to die. I/she whirled around and screamed, putting a hand to "our" face. The man had a cast iron pan and was going to hit me with it. Just as I screamed the pan came down on "us" and the visions left. And I was left standing at the end of the driveway in tears. It felt like she died or I did.

Everything felt so real; I don't know what I experienced. Can someone help me? I think if what I saw was really something, it happened at my house because the scenery didn't change just the sun position.

Then in 2012, the room I am staying in currently, I started hearing things. A child singing, a man grumbling, and a women sobbing. Usually at 11 pm, which after the voices, my legs would start shaking. Also I always hear this noise of air coming through a hole somewhere. Not like air whistling but a rush of air. Like the sound of someone blowing.

I don't know what these things are. I'm mainly concerned with the picture/vision I saw. So if anyone could please help me to understand what I experienced, it would be greatly appreciated.