A.M.
Take her to the gynecologist. My friend just did this to her 15 yr old daughter because she didn't want to use anything but wadded toilet paper, and she'd had her period for well over a year. Her daughter was pretty upset about having to go. However, my friend found a very nice, patient female gynecologist and explained the situation in advance. The doc prepared a really large goodie bag for her full of samples and pamphlets. My friend was really at the end of her rope, too, and this was the only alternative she could think of. After talking to the gyne, she learned that her daughter was really anxious about talking about her period, asking for tampons or pads, or even using them for fear of people knowing, finding out at school, etc. She had been hiding things out of shame and it had been a constant battle between mother & daughter. After hearing it from an actual doctor, though, she was more at ease and they haven't had ANY problems since....and that was late last summer. Good luck. Remember, it can be an incredibly hard time for girls.