While it usually disappears spontaneously after birth, you can manage the discomfort with these tips from BabyCentre UK :
Azelastine (Astelin, Astepro) is pregnancy category C. It is not first-line because ROP is not histamine-mediated. However, if a pregnant patient has coexisting allergic rhinitis, azelastine may be added. Oral antihistamines (loratadine, cetirizine) are safe for allergy but do relieve pregnancy-induced congestion because the mechanism is non-allergic. stuffiness and pregnancy