Hi I am 53 years old fit and active not overweight 56kg 162cm, under a lot of stress in the last few months, have been diagnosed with mitral valve regurgitation, ( 5 months ago) suffer from persistent cough due to this, the cough has been around 2-3 years though gradually getting more persistent and worse when I am stressed etc) lately the coughing has been worse and have developed sudden onset halitoses in the last 3 - 4 weeks, normally no bad breath and no dental issues