I wholeheartedly agree that the best option by far is to stop inhaling anything but air and prescribed medicine/oxygen.
Keep in mind though that nicotine addiction is a legitimate mental illness. It goes without saying, but I'll say it anyway, that any kind of pulmonary disease trumps mental illness. However, due to the nature of addiction, even the threat of death often fails to convince the brain that it's time to stop. Your own mind and thought patterns become your biggest obstacle in the road to better health.
With that in mind, still definitely speak to a physician. But also explore the possibility of a more team based approach to your health. Perhaps your physician can recommend someone to help you beat your addiction. Look for support groups in your area, or even online.
The bottom line is that it's up to you to improve your health, and beating your addiction would be a huge step towards that. But after so many years of forming these cognitive behavioral patterns, you will almost certainly need help. Don't be afraid to get whatever help you need.