Hello, I am 47 years old and I have made a big success. I stopped smoking after two decades of two packs a day! I know that I am still a long way from returning my lungs to some normal state, but I would still like to know how long it will be until my breathing improves.
You are right. It will be some time before you start to feel real improvement. Still, after two weeks, your smell sense should be much better. In time, morning cough will stop and oral secretion that was common for that time of day will be gone. Still, you have to know that the damage has been done, and most probably it will never be as before, but even that is much, much better than smoking two packs a day.