for the last 3 weeks i have been coughing up mucus. its a yellowy colour. i feel perfectly fine physically except for the coughing. i have asthma and allergies to dust and cats, both of which i live with. but i have been taking my asthma meds daily to keep it under control and havent had any attacks. up until recently i didnt used to take my inhalors all that often. mostly only when i needed it, but living with a smoker, dust and a cat i thought i should take better care of my asthma. and my allergies havent been bothering me either, if they do i take claratin and it gets the job done. so im not sure why im coughing stuff up... for 3 weeks.