male, age 47, height 5-8, weight 158. non smoker, non drinker - quit 20 years ago. On no medications. Take a one a day, fish oil, condroitin and D3 - daily. Active runner. Have chronic productive cough with white/yellowish phlem for one year. Pain in chest on upper left side - hurts when coughing, breathing deep, twisting, laying down(last 3 months). Went to doctor one month ago. Have had x rays, ct, also neuclear stress test and echo - all normal. go in for follow up with internist next week. Any ideas?