Hi I m Anna. I ve been smoking cigarettes four years now. Recently I ve turned into a heavy smoker. For the past two months, every time I smoke a cigarette I feel extremely weak and get a headache. I also have weakness in my chest almost like it s hard to breathe. I do have weakness all the time too no matter how much sleep I get (weakness gets worse with cigarettes). I also always have moderate back and neck pain. I have no blood pressure problems and other than these symptoms I am healthy. Thanks very much.