ghost in the house!

Hi my name is Rachel, I'm 16 and I live in Memphis. I have a Ghost experience that I would like to share. This happened in June of 2000. I was home alone and was on the computer. I didn't realize it at first but I kept hearing carnival music and people talking in the living room but I thought I left the TV on. so I went around the house and there were no TV's on. Well when I passed through the living room again I heard it and it was very cold. I got kinda scared but not to scared to leave. Well it stopped for about 2 hours and when I went to go to bed I thought I saw something out of the corner of my eye when I looked over there was nothing there. It was still very chilly. I went upstairs that's where I heard the knocking noise. I thought it was the fan in the kitchen so I didn't think anything of it. But it kept on and on. So finally I went downstairs and turned off the fan. When I went back upstairs it was still knocking I went around my room looking for something that it could be but couldn't find anything. Then it got cold. (Note: this is the beginning of summer and at night here it only dropped to 85 degrees and it is very hot upstairs.) I usually don't sleep with covers but I had to. I fell asleep but around 3:00 am I awoke with something hovering over me and rubbing my back. I sleep on my stomach so I was to afraid to turn around. So I went back to sleep. That night was the last night I would stay by myself. But when I thought about it a lot I realized it could have been my Grandfather who died 3 yrs ago. Watching over me. He always told my Grandmother that he would do anything for me. And I still think from that day on he will watch over me. Here is my story. I still can't explain the carnival music and the voices in the living room. But I know the ghost that was with me in my room and knocking was my grandfather. The temperature was at least 85 when I went upstairs to go to bed but dropped to at least 55. . . .Anyway thanks for your time. Rachel