I am a smoker and I also have had major heart surgery, I realise that I am stupid for smoking but I am 67 and wonder that if I stop now, will I really feel the benefits. I seem to be coughing a lot more now and bring up quite a lot of phlegm, sometimes, first thing in the mornings, I have noticed colourings in it, black, red and brownish. I get out of breath because I have a heart condition anyway and I'm reluctant to waste my doctors time if this problem is just due to smoking. Thank you.