Tell Me What This Was

Afew years back when I was 15 something strange and what I would call unexplainable happened to me..it's a pretty short little story and gets right to the point so if you could please tell me what happened:

It was around 2:00 a.m. and everyone in the house was asleep. I was awoken by someone shaking me and whispering "Jenny, Jenny get up! just please wake up!"

I sleep with my blankets pulled up over my head so I thought it was my little sister waking me because she had a nightmare, but when I pulled the covers off I saw a little girl. She looked so sweet almost angelic like..I couldn't say anything, actually I didn't know what to say..I cant explain how she made me feel except good.

After I kinda sat up and tried to make out who she was, she walked out of my room and I never saw her again.

Now I know what some of you might say--that it must have been one of your siblings but theres only one problem--the girl looked to be about 4 or 5, my sisters at the time were 10 and 8. I don't know what it was that woke me up that night or why, but if someone could please tell me what happened or who she was I would be ever so grateful