Clear sinus and being able to breathe again is something I would love to say I've been successful with. After many years of suffering, it's the same.....although now I'm once again using a vaporizer (with liquid Vicks) and find that's helping somewhat.
My husband also isn't snoring, so that's a plus. As a lot of you know, insomnia (or in my case now @ 77 almost 78) means no sleep whatsoever. And no, I've been cleared for bipolar illness, which does run in my family. So it's down to the sleep patterns and not being able to breathe is one of the major culprits...sinus.
I also have heart disease and not being able to breathe is non-stable for me. Bear in mind that a lot of us suffer from fibromyalgia (see a rheumatologist qualified in FM). There are a minimal amount of drugs that helps with the pain of this illness, plus gentle exercise in the form of walking; not lifting weights. I'm presently not walking because of falls....I wish I could. Mild yoga is also helpful, but check with a doctor who is knowledgeable about FM (rheumatologist and make sure he has worked with FM patients).
As we become older, allergies are a major source of problems. Worse year by year and there's not much you can do about it. The best news is that I'm now older, don't work and the acceptance, and belief by my family of my condition.
The above is the only answer I can offer to you. Some over-the-counter meds may work....but you'll need to see an allergist. Yes, I know and hate playing "specialist roulette" (as I call it), but for answers, that's your best route. I never found anything natural that worked and over the years, trust me, I tried.
So buy a vaporizer if you don't have one, run it all night and see both a rheumatologist and allergist if necessary. The rheumatologist may even know what's best for sinus conditions in FM sufferers. Good luck and do feel breath again. Yours, Lenora