I have had a cough now for over a year. Once I start coughing I cant seem to stop and I also bring up phlem, which is green. I have had blood test, chest X-rays and CT scan everything came back fine, except for the fact the my B12 is high. At times I will even lose my voice though this hasn't happen for 6 months.
I am so tired of hearing there is nothing wrong. If this is the case why wont the cough go away. I have never smoked and no one in my home smokes.