hi, Recently, for about 1 or 2 weeks, i feel a pain in the upper mid section of my back. I am a smoker and while i inhale cigarettes, i feel the pain gets deeper. I do not feel it in my chest, It does not feel like its the lungs, I do not have problems breathing, or any other side effect either. No sweating or numbness either. I have been experiencing pain through all my back lateley and it feels like if I had done a wrong movement. Should I be worried?, I am afraid of something serious.