i'm 16, been smoking for nearly 3 years and for 6 months to a year i've been having a mild pain in my right upper chest. it recently moved to my left upper chest and was worse but now it is still a mild pain on my right side. i have also recently brought some nicotine patches to help me quit. the pain is worse when i yawn and breathe heavily and i have a slight shortness of breath. i am goin to see a doctor next week. is their anything it might be and how could i prevent it.