COPD?

So my last medical diagnosis read Moderate Persistent Asthma. My doctor (allergist) told me after reading my spirometry results that due to allergies he thinks I have chronic obstruction of my airways. I have had asthma attacks previously over the last 20 or so years but very few and far between. This past February I had wheezes several days. They seemed mostly after exposure to cold. I ended up having a FeNO testand scored 49. My spirometry result at that time was 80. I was put on Advair 500/50 and already had a rescue inhaler. 2 months later I saw the doctor, did a FeNO and was down to 10. My Spirometry was now 76 and the doctor started talking about keeping it from getting lower in the 30s-40s like those with severe COPD. I was given Intruse Ellipta to add to my routine with a follow-up in a month. One month later my spirometry was 74 so I was given an albuterol nebulizer treatment and it went up to a whopping 75. This time the provider suggested they need to look into other possibilities than asthma. Reflux was suggested and while I do have some problems with it, it is controlled. I had a worsening cough with the Intruse so we stopped that. Next day I had a message suggesting I need to get tested for Alpha 1 and I am scheduled for that test in 2 days. So, I am trying to figure out just what I need to do to keep if not improve my lung function and keep it from getting worse. I did use my rescue inhaler the day after my appointment because the Intruse cough was so horrible and it did wonders for both the cough and my breathing. I also feel much better off the Incruse. I am assuming I have COPD since my spirometry is under 80 and did not improve much after the neb treatment but in the back of my mind I wonder if the irritation from the Incruse affected my results. So, I have tentatively joined this site and hope to learn all I can to stay as healthy as I can for as long as possible. I hate seeing lower and lower spirometry results.