Is it okay to swallow some nasal spray?

Yes. The things in nasal spray won't make you sick. You could drink a whole bottle of the stuff and be unaffected. Almost all the the "stuff" in nasal spray is water. The other ingredients, depending on which brand and such, are designed for use in the nasal passages and will not harm the lungs if they are inhaled completely. They certainly won't affect your digestive tract.