A few months ago I had a chest xray done because I had a swollen lymph node and they found scar tissue in my lungs. The doctor told me not to worry about it because it could be from medication I was taking for rheumatoid arthritis or chemicals I have inhaled. (By the way, I am 30 years old.) But last month I started having short sharp pain in my back lung. I had another xray today and will get the results on Friday. I am scared to death!! Is that a symptom of lung cancer?? I don't have a cough or any congestion. I know most people,I think, develop a cough. Please let me know if that is a symptom. The craziest thing is that I lay in bed everynight thinking of my 7&10 year old and how I am gonna stop smoking but in the morning I am right back at it. I really tick my self off! Please help if you can offer any answers. thanks!