Oh! Something else you can do, if you like tea- drinking either peppermint tea, or any kind of mint tea, always helps open my breathing passages when I'm sick. (I hate the coughing, I almost always pull a muscle in my chest when I get a cough.) And it helped my son too, with his breathing problems- I added copious amounts of honey so that it would taste good enough for him to drink it.
Breathe Easy works especially well: