Hello, Thanks for posting, You will need to have the mucus tested for bacterial infection as it is often the cause of this. Putting all your symptoms together, it is possible that you might be suffering from an upper respiratory tract infection or a complication of a heart diseases which might require a course of antibiotics to get rid of it. I suggest you book an appointment with a doctor who can do you a physical exams, run some tests including x-ray of the chest and probably provide you with treatment. To some people, mucus production is normal and could mean absolutely nothing to worry about, but if yours is recent and disturbs your daily activities, it is best you get checked. Hope this helps