Why did I forget it?

Guys, I have been looking at things about Dream Guides. It seems at one point, their DG has tried to contact them previously but I completely forgot a dream that I had, well I don't know when.

I forgot the beginning, but I think that I was stuck in my house. Everything was boarded up, it was dark but the kitchen light was on. So a little light.
The ending of that nightmare (the dream really terrified me for some odd reason) I saw this shadow in the kitchen. I kept yelling "KILL ME, I WANT THIS TO END" then this girl, in black, fairly young and pale (their was also a mirrored version of her) ran up to me really fast.

"Your dreaming. Don't be scared. I love you."

Then, I was at this shack house trailer thing in this nice bright neighborhood.

I also forgot, I became lucid in that dream WAY before I discovered lucid dreaming.

Do you guys think that the mirrored girl could be my Dream Guide? She said she loved me, told me I was dreaming, and encouraged me. DC's don't do that. What do you guys think?

I think the fact that the DC knew it was a dream is almost a dead giveaway that the DC is in fact a DG.