Zyrtec and Flo-nase works well for me, but everyone's biochemistry is different. I recommend getting an allergy panel if you have access to affordable healthcare. Otherwise, try every OTC allergy med one at a time.

Here is a wild theory: I have cats and I'm not directly allergic to them, but I found that brushing them helps improve dust mite allergies because they shed less and leave fewer surfaces for dust mites to cling to.