Since I was about 7. I've had psychic experiences. When I was seven my sister and I saw ghosts in her old bedroom. There were three people. Two were men from the military, like maybe 1920's or 1930's, and there was a woman. The men were arguing about the woman. It seemed they were fighting. One of the men, who looked younger than the other, shot the other man. Then the man shot the woman and he shot himself. I thought it was a dream, but I stared at my sister and asked her if she saw that. She was frozen and fixated on the area where we had just witnessed the murder and suicide.
There was another incident that happened. I don't remember when exactly, but I was walking down the stairs to see what my older sister was doing (the one that saw the ghost with me). I saw salt circles and candles. I had no idea what was going on. A flash of white light lit up the room and I woke up in my bed confused.
Four years after that happened, I had moved into my grandmother's house. More things happened there then the few events that happened at my dad's.
A year after the first event, I was at my grandmother's with my best friend. We were getting ready to go to sleep when I noticed a red dot at the end of my bedroom. I turned to see if it was coming from the other side of the room or my window, but when I turned back around I saw a man about to strike me with an ax. I put my hands up as if to defend myself and I saw him turn and strike a little girl. I could hear her blood curdling scream. It snapped me out of this trance and my friend was just staring at me asking me what was wrong. I was just staring at the window freaking out about what I had just saw (in my head).
I have many stories of experiences growing up in my father's house and my grandmother's house. I have no idea why they happened to me, but I'm happy to finally share them.
It's normal for certain people to see these kinds of things, more energy-sensitive people. You can protect yourself by clearing the energy so that it is free of all the residual energy. It may take a few times, especially with something like a man killing a girl with an ax, but eventually, it should help. Also, you can protect a room by sageing it, putting holy water where you saw the memory, or salt. Always ask your guides to help you. There are beings out there that want to help us, like angels, and they're just waiting for us to ask them.
Good luck.