So glad you found our group!
Your symptoms sound so much like mine when I started this journey. I hope you'll consider “silent reflux” as a possible cause of the chronic cough and post nasal drip.
If you get to see the experts at Mayo, they can help you get a clear diagnosis and work back to the root causes and contributors to come up with the best plan for you.
And don’t let yourself be intimidated. The treatment for MAC is not a huge deal for many people. Just one step at a time.