I am 57 years old. I started smoking when I was 15. on July 03, 2016 i stopped smoking. I was smoking about 13-15 cigs per day when I quit smoking. After that I never smoke even a puff. Thanking God for the power He showered me. Now I am having a problem of short breath some times and hairy gray cough forming often. What could be the reason and please suggest some remedy