I read about how hormonal changes can cause rhinitis. i've had rhinitis almost permanently for over two years now. could contraceptives be the reason?

Not common: Certainly it could be hormonally related , but more common things would include allergies or nonallergic rhinitis. Allergic triggers include trees, grasses, weeds, molds, pets and dust mites. Many people have nonallergic rhinitis, which is sensitivity to temperature changes, air conditioning, heating, chemicals, paints, perfumes, pollutants in the air, diesel exhaust, and tobacco smoke. See ent.

rhintis medications: Runny nose apart from allergies can be caused by medications including oral contraceptives. Before giving them up make sure no other reason esp overuse of nasal sprays over the countrr.