What I found works for me is getting a nasal steriod spray, like
Rhinocort Aqua, Nasacort, etc., After I started using this at night it opened up my
nasal areas ( which I did not realize were clogged), then I use the mouth inhealer in the mornings and that seems to work for me.
Since I don't know your situation, please make sure that you don't stop using any medication and have a attack. You do know your body better than anyone, just be careful.