Hi I am a 15 year old and a smoker I have been gettin back pains , chest pains my jaw has been hurting and I have been getting pains at the side of my head my lungs r going smaller and I am very worried that I will die and my arm has been sore but I don't know if it's cos the way I have been sleeping my breathing is not that good but I have always had trouble with breathing I just want to know what is wrong and if I have lung cancer I am really worried I don't want to die so early