JMB, AFIB doesn't have a relationship (except for your overall health) to your lung problems. If you have ILD you would have been informed by now. You have "freedom of will." and you should commit to using it to change any trait that you have that you don't like! Not easy, ubt you can do it if you want to live a better life for you and yours. The inhaler IS for emergencies, and the nebulizer should loosen up and help clear your lung, and result in easier breathing. You should use it as often as needed. Good luck!