dr khadwa please help!!!

Please can you help my daughter who has the following symptoms:

She is 17 and has a short attention span is easily led astray,she finds it difficult to concentrate on her studies. She is always in a mood and sleeps well but it is never enough. She can never take no for an answer and will continue to ask the same question. She prefers to be with her friends and spending time is never enough with them. She injured her knee several years ago but the injury has not healed the knee often locks and clicks and she no longer can participate in sports. She suffers from back and stomoch pains and her periods are severe.
She was never like this, she is very intelligent and had won a scholorship to a grammer school but since 5 years it has all gone down hill