All of the above plus: allergy covers for pillows and mattress, nasal irrigation with a neti pot or squeeze bottle (they sell the nasal rinse bottles and saline mix near the allergy medicine at the pharmacy), bathing your dog frequently . An allergist will have a really specific list of recommendations. Making your dog an outside dog is a terrible idea, it would be better to find a new home for your pup, rather than exposing them to the elements and leaving them outside all alone with no companionship
Around half of us are just as (or more) upset about it as you. Our cold civil war has been getting warmer and life will get much worse for many of us. Just wanted to drop that reminder since some of us may end up as refugees trying to escape to saner countries.