@roca
I have empathy with you as I have had it for over 20 years. I had sinus surgery in 2001 where the surgeon opens my sinus passages to keep me from getting so many sinus infections that were blocking sinuses.

It worked but created another problem with constant and heavy sinus drainage down my throat and out my nose. Real pain in butt but better than sinus infections.

There is one nasal spray (prescription) that dries up your sinuses. It does work but I don't like that much dryness so don't use mine.

Not a ENT so this is just coming from my experience. My nasal congestion was due to polyps blocking my drainage holes. Did they do a nasal scope on you? If not asked for one.

You say sleeping in recliner helps. This would be with your head up. Is your issue drainage coming down or blocked sinus and no drainage. If it is drainage what I do is sleep with my bed up at head ( I have a bed where you can raise head and/or feet) and additional pillows to keep my head up and not drain down.

If you have nasal congestion, is it all the time? Or does it come at certain times of day? If it comes on certain times of day, what are you doing, then? If it is worse at night, you may have an allergen in your bedroom. Mine comes on when the wind is high and pollen is in the air. Not only get nasal congestion but bronchial too.

My suggestion is to ask ENT (are you seeing a ENT if not need to) to do a nasal scope (painless) to see what is blocking sinuses. If open probably a allergen causing it. That comes with allergen test or like I mentioned when does the congestion come on the most as probably where you are is the cause of congestion.

Again, I have had two sinus surgeries and have been seeing a ENT for 35 years so the above is not me as a medical professional but what my ENT specialist have given me as causes and solutions.