Spirometry is the definitive test for COPD and is rarely given by the pulmonologist; they're not trained to give the test, just to read the results. Given what you reported as the results, the diagnosis at that point was correct. However, you were having major syjmptoms of the flu or some respiratory disease, and those definitely influence the results. It's not unusual that you showed significant improvement once you were over whatever bug you had. The six minute walk test is only to determine whether you need supplemental O2, and it sounds as though that was also done correctly, and you don't need O2.

I would encourage you to get that second opinion from another pulmonologist and to also see an allergist. It sounds like much of your difficulty may be allergies rather than COPD. And a good counselor never hurt anyone and may be able to help if some of your difficulties are due to anxiety.

My primary did do a spitromity test on 1st visit

I read somewhere of someone who had mid 30s and then being ill and in hospital at 16% but recovered back to the mid 30s when the illness cleared - so that person had a significant change just as you had. The 6 minute walk test is a world wide standard test for blood oxygen drop on exercise and requires one to walk 30 meters up and down as fast as they can - here are more details and you can compare to your experience https://www.physio-pedia.com/Six_Minute_Walk_Te... No idea on blood pressure, but I do agree with the previous poster that "spirometry is the definitive test for COPD" and my understanding of the walk test is that it is a measure of how to handle COPD treatment. If this is the case then it is as well to read and understand as much as possible because there is a lot the individual can do to stop things getting worse. Hope this helps

Thank you Jean. I am going on Monday for a second opinion.

Have you heard of other people having an increase of 23% in the FEV1?