Flonase (fluticasone) has been a life changer. I have taken for granted how valuable breathing is in terms of speech, let alone sleep and general fatigue.
Recently my allergist gave me a tip with regard to nasal congestion. First, you can use Flonase and Astepro together, apparently they work better when used together. Astepro has an antihistamine in it that can help. Second, moisturize the interior of your nasal passages with a drop of muciprocin in each nostril applied inside your nose at the tip of it, then squeeze your nose gently to distribute. This lets you use get the benefits of Flonase without drying out your nose (which can trigger congestion).