Just wanted to share a cheap suggestion that has helped me with poor breathing due to narrow breathing passages. This was temporary due to bad respiratory virus, but was effective. Nyquil and breath right strips. Probably using NyQuil every night is not a good idea, but could perhaps use on occasion, or some other nasal dilator drug such as asthma medications/ steroids. But the breath right strip can be used all the time, and it really does open up your nasal passages noticably in my experience. Maybe worth a try.