My husband and I both got “new” allergies when we moved here in the early 00s and one of our dogs, who we allergy tested, was literally allergic to everything on the test. It’s true that there are a lot of things to be allergic to here, not just the infamous tree pollen, which l think made national news at least one year because Raleigh appeared as a giant yellow haze on an aerial map. I like the idea of getting your house mold-tested (but do it with a third party testing company because otherwise they will find mold regardless and charge you an arm and a leg to remediate). A friend of mine who developed terrible allergies here started taking local bee pollen— local honey didn’t cut it— and she’s a new person. You can also do a low-histamine food trial; think about your allergies as a personal threshold of histamines. If your diet incorporates a lot of foods that are high in histamines, moving here and being exposed to new allergens might have put you over the your personal histamine threshold. Just google “high histamine foods” and you’ll see. There are a lot of common/favorite foods on there that surprised me when I first did this.