I have severe allergies year round. I get allergy shots, which have helped. I take Allegra-D and Flonase, which have helped. I go to acupuncture, which helps drain the congestion, a lot, but is a temporary measure. I also rinse with a saline solution two to three days a week.
I use a kosher salt (one-third teaspoon), baking soda (just a pinch) mixture in an 8 ounce cup, with warm water, and apply the rinse into my nose with an ear syringe.
The first time I did it, I filled the syringe, held it just inside my nose and squeezed. Water shot out of the syringe, hit my tonsil, the back of my throat and some of it ended up in my lungs. I had to get a prescription to clear it up.
I apply the rinse while I'm in the shower. I hold my head up, tilted a little bit back and tilted toward the side that I want the water to flow. Then I pour in some of the solution and gently blow my nose. It takes a couple of applications on each side for the stuff to loosen up and come out, but it burbles right out.
A few times, the water has gotten trapped in my sinus cavity. So I also bend over at the waist and angle my head up a bit, turning it from side to side to see if it will come out.
It's a temporary measure. I did it this morning and am starting to feel stuffy again, but it does provide a lot of relief!
Keep with it! Good Luck!