My GP thinks I have COPD. I saw a pulmonologist who said I don't have COPD. My GP told me at my regular checkup after that, that she still thinks i have it. My O2 sats are better since my cardiologist changed me from metoprolol to verapamil. I take breathing treatments once or twice a day...... generic Duoneb. I cough up tons of mucous daily, some days worse than others. Any advice? My GP is taking good care of me.