Freaking allergies.....If you don't have issues, what are you doing? Pollen count 9.5/10.  I'm a medical professional and I've tried Zyrtec, Allegra, Sudafed, Benadryl, and steroid nose spray,  neti-pot and changing air filters.
Spruce/ AKA mountain cedar seems to be the 100% culprit. 
Someone suggested Vitamin D3 might help boost the immune system.
Anyone else have any suggestions? At this point, I've been in bed with swollen/itchy face/ flooding nose/sneezing/coughing. Benadryl/sleep

 is the only thing that puts me out of my misery. 
Usually, I'm the one giving advice. 
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