Jaded,
I did see the movie, and didn't find it as moving as I thought it might be. Why I wonder did it affect you mom as it did? Perhaps the content, but it does not apply directly to you being you are the opposite of "Gwen". I would assume if your mother was drawn to it to the point of not sleeping, then she does have a clue as to how you "are". You need to tell her Jaded. This is the best time while it is fresh in her mind. Don't be afraid, she will still love you.
Marco