Thanks for posting a query in health care magic.
From the description that you have stated it appears that your pain is non-cardiac. The most common of non-cardiac pain is either gastritis
/ reflux disease or musculo-skeletal. You should undergo a course of anti acids for 1-2 months and bring about dietary modifications.
Also get an X-ray of chest done to rule out any skeletal cause. Do you remember of having suffered any trauma around the onset of the pain.
lastly answering your specific question- it is highly unlikely that the above symptoms are due to any lung cancer
Hope I am able to solve your concerns.
If you need any further details, you can contact me directly by using the below mentioned link:
Wish you good health.
Dr. Srikanth Reddy M.D.