The tactile sensation you feel over your chest has the same cause as the sounds one can hear with a stethoscope, mucus or water in the airways or air sacs. Rales are fine crackles and can usually not be felt with your hand. They are most characteristic of heart failure and a class of diseases called interstitial lung disease (ILD). Ronchi are coarser sounds caused by the rattle of mucus in the airways. What you feel are probably ronchi, since they clear with cough and the expulsion of mucus. Ronchi are characteristic of chronic bronchitis.
Your chronic bronchitis may or may not be reversible, but there is a good chance of reversibility and, with that, the excessive mucus production and the ronchi caused by the mucus would go away. That might take a year or more. But the fact that it is present at your young age is a strong indication that your lungs are vulnerable to the development of COPD. This is a red flag that you should never smoke anything again, if you want to avoid the development of severe lung disease with emphysema that would probably lead to a premature death.
With smoking cessation your lungs should clear. If they seem to worsen, in any way with abstinence, you should be examined and have a chest x-ray to ensure that you do not have something else, unrelated to smoking, going on in your lungs.