CPAP or Aftermath of nasal polyp dislodge?

Wow. What a great resource this is!
I have been the happy user of a CPAP for almost 6 years. No issues. I have had hay fever for about 20 years. I take fluticasone propionate nasal spray daily -- and it's been a real Godsend for alleviating my allergies. I jus tspent 4 days in the San Joaquin valley (i.e., lots of agriculture there -- and it's Sept) then took a 90 minute plane ride home. Now in San Diego with decent air quality, but my sinuses began to get riled upon return. Garden-variety headaches with no "real" congestion I could remedy by blowing nose. About 4 days later, in the middle of the nite, I blew my nose. The episode yielded a small gush of watery/bloody liquid and a tiny amount of tissue. I reckoned this was a polyp. (My dentist "found" a cyst or polyp in my last x-ray. Did not follow-up, as I understand these are usually non-issues!) But now? After this somewhat unnerving "gusher" episode? I'm walloped by a messed-up sinus cavity from whence the "polyp" came. Within 24 hours, I did a neti pot. I continue to get a thick mucous that's solidly a dark orangy-red in color when I blow my nose (no streaks), which alternates with clear or slightly yellow mucous at other times. When I lay down, the compaction sensation lessens (presumably since the mucous is "traveling" in my cavities because of the gravity). SO, the question: "Is this the typical aftermath of a dislodged polyp? Or is it exacerbated by the use of my CPAP at night? What about the pressured cabin and the dry air of the airplane?" While I do not religiously clean my CPAP, I am faithful regarding use of distilled water only. I have NEVER experienced a sinus infection from the use of my CPAP. PS: Nothing is in my lungs. This is all happening in my sinuses. Many thanks for your attention. I'm not a hypochondriac-type, but I use my voice for a living. This is a dickens of a deal for me...as any crammed nasal cavities seriously affects how I sound... Thanks again!