I think I saw a ghost?

[Rose]

Okay, first, you must know, I'm thirteen. Ever since I was little, I've heard people calling my names, when no one was there. At first I thought I must just be imagining it. When I was ten, I started being able to see people. Many people, not always scary, some so scary it's unbearable. But, when I looked back, they were gone. Recently, it's gotten worse. I've started getting dream after dream of death, killing, torture, so on. None of them involve me, just other people. People I've never seen or heard of. One time I was riding my horse out on a dirt road, about half way down the 10-mile dirt road where I was in the middle of nowhere. I heard someone call my name then scream. My horse spooked at whatever it was and took off at a full gallop for home. I could only stop him once we were back in the neighborhood...I'm pretty sure he heard it too. I brushed it off and moved on. A few months ago, I had a friend over, we were sleeping in my sister's room when we heard a loud crash. We both woke up and looked at the wall next to us. On her wall, as if water was dripping down it, there was three letters, H E L...Nothing. I screamed and tried to hide. My friend didn't know what was wrong. We went riding our horses later that day. When we were riding out of the driveway, someone called me. I looked around and seeing no one called my dad to see if he called me. He didn't. No one else was out and my friend didn't hear it. When we were finally home, I went upstairs to get some pain reliever, as I had gotten a headache. My lights started flickering then went out, in a flash of light I saw a lady, when the lights came back on seconds later, she was gone. I was extremely tired and fell right to sleep. I had a dream about the same lady killing many people. Her name was Countess Elizabeth Bathory. This is the second dream I've had about her. I'm a christian, through and through, but I can't help but think this is much more than an over-active imagination. I honestly don't know what to do. I may just be crazy. Though it's doubtful. I believe in ghosts. And, I'm not sure if I want to be left alone or not....It's cool, and it makes me feel helpful. How can I see them whenever, like can I call them? Please..just help me.