I would go see an allergist. I am also allergic to dust & dust mites. But I get the classic symptoms; sneezing, watery/itchy eyes and lots of sneezing. I couldn't even vacuum or dust my bedroom without having an "attack". I even resorted to wearing those white dust masks that they sell for when you are sanding something. My kids thought mom looks really weird with her mask and her vacuum.
Since visiting with an allergy doctor and getting on Allegra & Rhinocort (I am also taking allergy shots) I am having a much easier time with dust.
OTC antihistimines work great but they always left me so groggy. Allegra does not and it takes care of my symptoms. I would recommend it.