so I've been coughing up black coffee grounds for a few years, I've seen at least 5+different doctors that have not been any help, the only thing 1 doctor told me was to try to stop smoking,I've smoked cigs since I was 17,so I quit cigs for 6 months with no change and saw the doctor again and he wasn't able to tell me anything.I cough the stuff up at least 10 times every 18 mins, sometimes more. Does anyone else experience this?Also can anyone provide insight to this?