Welcome to the group. I'm sorry you need to be here, but I think you'll find it a very helpful and supportive group. I'll ask you a few questions that will guide others in their answers.
I think you'll find many here managing the disease successfully.

Are your doctors well versed in treating MAC? It's uncommon and some docs treat few cases.
Do you also have mention of bronchiectasis on your CT's?
Are you doing any airway clearance? It's very helpful in managing it.