Good morning, Helen, Not Kathy, but here is a list of questions to ask:
https://www.lung.org/lung-health-diseases/lung-disease-lookup/bronchiectasis/questions-to-ask-your-doctor
When you say you think you may have been misdiagnosed, what do you mean? What symptoms or issues do you have? Are you consulting with a pulmonologist or infectious disease specialist who is experienced in treating MAC, and working with complex diagnoses? Many who routinely deal with typical asthma and COPD cases are not aware of the special needs we have.

Sue