My life has become living hell [nose blockage]

[Sleeprider]

arc, have you tried a nasal pillows mask? The Resmed Airfit P10 has kept my nasal passages open without exception, including in allergy season, through colds and illness etc. Like you, I can't lay prone without complete blockage. Think about having a nice relaxing massage, but you can't breathe! I can actually lie in that position with the positive pressure through nasal pillows and stay open. I am often congested during the day, and the positive pressure at night is the relief. I have had some more severe congestion that actually blocked exhale flow, and I used Flonase to get through those periods.

[Crimson Nape]

Another mask that I've found works for a stuffy nose is the Resmed F30. By my conception of what an FFM is supposed look like, this mask is a misnomer. It's basically a nasal pillow with a pressurized mouth cover.