WOW I thought it was pretty uncommon to get them that early but a few of you have also got them pretty young. I was almost 15 before I got mine. I can remember wishing for bigger boobs but bot by getting my period! LOL.
I remember the day I got AF the first time. Last period of school & I just new I needed to go to the toilets. So off I went & not only did I have nothing in my bag for AF, the bloody toilet I went into had NO TOILET PAPER!! I managed to swap to one which did without to much mess, not that I could have made more. When i got home my mum wasn't home & I was lucky that I had a free pad that was in a magazine I had bought at some point still in my draw. I threw the undies I was wearing in the bin & just balled my eyes out when mum got home. The first thing I said was DON"T TELL GRANDMA! I didn't want everyone to know & knew she would be teh first person mum would tell. I didn't actually get another AF till about 3 months later I think which was a bit of a pain cuz I had marked up my little diary with all the dates I would get it thinking it was like clockwork & every 28 days it would turn up. Mum use to tell me when she had hers & askif I did too & that if i let her know when I get them she would keep track & let me know when I was due next, asked if I wanted to know how to use tampons. I was so freaked out by it that I fdreaded moments alone with her in case the topic of pads & tampons was brought up. I would avoid the shopping isle that had pads etc so she wouldn't ask if I needed any infront of other people. I think mum went a bit over board with the whole mother daughter thing because she missed out on doing it with my 2 older sisters for verious reasons.

I think having a chat with your DD about going & seeing the GP about medications to help with the pain etc. I wouldn't word so that she thinks she needs medication for her moods or because she got them so early. I think she would only rebel on the idea. But if she thinks its just something to help settle the pains that come with it each month she may be more open to the idea.

Good luck with it.