Get a complete master health check with investigations to know your health status.
CXR to rule out any kind of infection.
Blood tests to know your Haemoglobin, sugars ,
lipid profile,
Liver and
kidney function tests.
It's good that you have stopped smoking.
People who stop smoking, their risk for heart problems reduces to the level of non smokers. So , do not get back to smoking.
Daily excerises help you to remain healthy and reduces the risk of
Diabetes and Hypertension in future.
Consume less salt for a healthy heart.
Avoid Junk food.