Wow, Spooky Girl!!! That's an AWESOME Theory! You COULD BE right!!! There's no reason why that it couldn't be a possibilty!!!
Hmmm! Megan from a former life? What a fascinating concept!!!
Reincarnation is believed by MANY of The World's Religions and actually by MOST people on Earth! Though I am Jewish and Religious, my religion DOESN'T teach reincarnation. Yet, I've always thought it exists. There's alot of evidence to support the existance of reincarnation. Besides that, I've always wondered, "what does G-d have up in Heaven anyway? A Baby Factory?" LOL!!!
It seems to me that G-d would "Recycle Spirits." It only makes sense.
I do have one question about your theory though. Megan is reincarnated, Her' spirit has returned in a new body which is NOW Megan, right? Okay,,,how then can Her' Spirit which is in Her now, be manafesting itself in the mirror? Do you think that maybe Megan is projecting The Girl into the mirror herself,,,like psychically? Perhaps Her' past-life incarnation DOES have a message for Her, and is somehow causing Megan to project the image of Her' Former Self in mirrors. Since it is in the mirror and Megan sees The Girl in The Mirror instead of herself, perhaps it is some sort of psychic projection, huh?
Maybe Megan's Mother DOES know the girl. It MIGHT BE possible, if not consciously, then she recognizes The Girl as Megan subconsciously. The crying seems to indicate that the girl, Megan's past self or otherwise, is distressed about something.
ABOVE ALL THOUGH,,,I'M VERY HAPPY THAT YOU WILL NOT BE MESSING WITH OUIJI BOARDS ANYMORE!!!