At age 35, with your relatively slight smoking history, there is a real, but small likelihood of this being cancer. It is more likely that your symptoms are due to some type of chronic airway disease. This may be related to an increased sensitivity to marijuana. It is equally likely that smoking marijuana is causing your symptoms. You should stop before you cause permanent lung damage.
It sounds like you have been tested for cardiopulmonary problems and everything has came back normal. Your problems may be linked to sinus drainage. Just a thought. I hope things go better for you.
well i think you should get your pft's tested might be a good idea
I forgot to add the cough has been going on for 6 weeks now and yes I had a spirometry test at the UIC Pulmonary Clinic before my visit and I don't recall the exact results, something like 108%,98%,96%, anyway it was normal apparently. I am very athletic. Also had a Metholcholine challenge a couple years ago, also normal, I believe all result #'s above 100%.