@cate123456 Ow, I can sympathize! Before my MAC & Bronchiectasis diagnosis, I spent months that way. What finally helped it was 30 days of prednisone plus the nebs (and Singulair seemed to help).

I also know that I can still set off the spasms almost instantly with certain scents in the air - scented air fresheners and soaps or fabric softeners, something in disinfecting sprays & wipes (even unscented) and insecticides can cause coughing for days. Even things that never bothered me before can set it off, especially after a respiratory infection. A change in dishwasher soap set me off one time. My brother has the same issue, and his wife thought he was "being dramatic" until she saw us both leave an event in coughing fits.

If you haven't already, maybe look at the environment to see if something might be aggravating your situation. Also, my pulmonologist prescribed an inhaler commonly used for COPD (Symbicort) that is a combo of a long acting beta agonist and a steroid and it has greatly reduced my need for the Pulmicort & Levalbuterol (as well as saving lots of time!)
Sue