I have really bad hayfever... I found that having a shower at night to sort of clear out all the pollen in the air around me & clear the sinus' helped. Also one of those up the nose sprays afterwards, like otravin or one developed for allergies. I used Azep for a while. I found the nasal sprays (which I hate) actually worked heaps better.

Also all those immune foods that help boost, vitamen C, and B's are great for helping.

Basically what you are doing