I do alot of heavy coughing and sometimes I have some pressure on my chest, I am an obese 52 year old woman with high-blood pressure so I'm not even sure if what I'm feeling is just part of that or second-hand smoke which I'm around every day plus I have alot of family history in Cancer & my brother died 5 yrs ago from lung cancer plus throughout his entire body.
Obesity wont help. Stop guessing and driving yourself crazy, start with a good pulmonologist and take it from there.
Get a chest exray. My mother had a persistant cough for months and was diagnosed with stage IV lung cancer.