What would cause me to have a cough for six weeks? it is productive with mostly clear mucus but occasionally green. constantly clearing my throat from mucus buildup but not sure if its from drainage or from lungs. been fatigued as well. any ideas?

There are many conditions associated with a prolonged cough. The green color of your mucus may be associated with an infection. A chronic infection including TB should be considered. A sample of the sputum and a course of antibiotics after discussion with your PCP may be considered. A chest image may also be useful as indicated. Keep well hydrated, monitor your temperature and avoid smoke.