Thanks for your kind words.
I too remember going through a phase like this but like you I weas also 14-15, definately not 11!!!
Nothing has changed family wise, and I do think some of it could be hormonal, she has the usual signs, greasy hair, some spots etc. I have really tried to spend more time with her, just the two of us doing girly things and when we do this she is absolutely brilliant and loves it, but then the next day all returns to normal.
Several females in the family have tried talking to her but she tells them its me and that her and I just don't have a very good relationship, which really hurts me to the core. I also forgot to mention all the lies that she tells, she lies about everything, even silly little things, but she does this to everyone in the family and it frustrates us all, we do not know when she is telling the truth.
Also lately she has told us that is going to call childline and report both me and her dad, telling them that we abuse her, by hitting her and battering her (which is definately a lie) so that she can go and live in a home as she thinks she would be happier.
It is so frustrating and upsetting and is even starting to cause problems with me and my husband.