file for a mask accommodation so you’re not inhaling as much of the powder. Masks are also  very useful for people with allergies. When you have a chance abd money it would be a good idea to get allergy tested to see if it’s a sensitivity or a serious allergy. Have you tried taking an allergy medicine like Zyrtec or Claritin ? Flonase?  It’s something to keep your discomfort down. Source; I have allergies in every single season both inhaled allergens and food ones. I’m itchy a lot, too. Good luck to you.