I apologize for misreading - I see that you in fact do not have asthma. Regardless, it is important that you consult with a physician prior to starting any steroid medication, regardless of whether it is sold over-the-counter. But your best bet is to start with sinus rinse at least a few times daily for a few weeks. Also take a look around the house for any new potential allergens (new rug, new pets, new shampoo, etc..).