Ouch! I think you did too much too quickly and irritated something.
I personally cannot use the Aerobika on any setting with the nebulizer - too hard for me to breathe, and I start to hyperventilate.
Maybe try just the saline , and only do half of the vial, for a day or two, followed by the air physio or the Aerobika set to 2 or 3?
It sound like it is effective in helping you bring up mucus.

Sue