Thanks for your question on Health Care Magic.
I can understand your concern.
In my opinion, you should
consult pulmonologist and get done CT thorax with Contrast to know the characteristics of nodule because you are at high risk for malignant nodule.
You are smoker and having positive family history for cancer. So get done CT thorax with Contrast.
CT will tell you about exact size, shape, structure of nodule. CT will also tell about association with surrounding lung structure,
mediastinal lymphadenopathy etc.
All these points are important in differentiating between benign and malignant nodule.
If it is benign lesion then no need to worry. But if it is malignant looking nodule then
biopsy is needed for confirmation.
In any case, better to quit
smoking as soon as possible.
So consult pulmonologist and discuss all these.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.