cancer??

hello.  I am 29 years old and have a about a 3 pack year history (about 7 cigarettes per day for the past 8 years).  I am trying to quit smoking but it has been very difficult.  Today is my new "quit day" so I am giving it another shot.  My problem is i have a persistent chest pain only on my right side.  The sypmtoms worsen when I smoke.  The pain is not always there, I have days with no pain and then other days with chest pain. The pain is dull and nagging and is not extreme.  My other symptom is i cough up little brown spots on a daily basis.  There is never any blood in it though.  My doctor attributes the problems to acid reflux and has diagnosed me with acid reflux and i had an endoscopy done which further suggested i have an acid reflux problem, but the acid reflux medication is not effective.  I stress out all the time about the possibility of lung cancer.  I have had the chest pain and brown spots in my sputum for about 2 years.  I had a chest x-ray 2 years ago which showed no problems and I had a ct scan one year ago which showed no problems.  I have no other symptoms and have no problems with wheezing and I am able to exercise (basketball, running, etc.) without any problems.  Could this be lung cancer.  Is that likely.  What should i do to rule out lung cancer

[National Jewish]

Concerning your chest pain

[Brigham]

Hi Im a 28 year old male, smoking 1 pack per day for about 10 years.  I to have been waking with lung pain mostly on my right side when I wake up in the morning. I to am freaked out about lung cancer, but everything I have read on the net tells me that it is very rare for someone under the age of 40 to get lung cancer.  I had this sort of pain about a year ago, also with heart pain to.  I had a chest Xray everything was normal.  Now it seems worse and its been about three weeks and its not gone.  Im quitting today..lol.. Trying anyway!!!  I asked my GP if people my age get lung cancer and he saqid NO!!!  Unless you have been exposed to asbestos.