I am a 14 year old girl, and for about a year now I have been getting pains in my Back,Hips, and Legs but for the past few months now, it's been getting worse. For example, When I'm standing and for not very long ( 2-6 minutes) I get these horrible pains in the lower part of my back, In my Pelvis/ Hips ( Mostly around the joint where the Femur bone connects) and the pain wraps around my legs( Almost ALWAYS and ONLY my left) and stops around the Knee joint. My Mother seems to think that my heavy book bag is causing the problem, but I've only been carrying around all my books since my school had to share with another school because of mould problems, and that has only been for about 2 months. This has been going on for about a year, and even now My Back is aching, an Aching and It really hurts! Please Help! :-(