I have the same medical problem. When found out was pregnant, i stopped using nasal spray too and got sinusitis quite often and had to be put on antibiotics.... Went to see my gynae, and he said it is fine to continue using the nasal spray. I'm on Nasonex by the way. Cos nasal spray are much safer that oral medications. So when we are pregnant, if possible can avoid oral medication then avoid... There are other alternatives also. Hope this info helps.