Has anyone had green mucus for over a year?

I was diagnosed with BE about 10 years ago. Never did anything about it. May 2023 I caught a really bad lower respiratory virus and was on antibiotics and steroids for 2 weeks. When I was sick I starting coughing up lots of green mucus. I went to see my Dr at NJH last October and had 1 sputum test show MAC but then have had 6 more tests that are negative. Fast forward to today and I have been doing nebulizer with saline daily and sometimes levalbuterol along with a vest once a day. I still cough up green mucus every day. And I cough it up only when I lie down and stretch after my workouts or if I lie down for a nap in the afternoon. My Dr seems to not be concerned about the green mucus, but I am. Does anyone else cough up green mucus daily?