How to cure hayfever in pregnancy without medicines?

Get a kit to do a sinus rinse (such as a Neti pot). It is cheap, and all natural. Follow the instructions to rinse your nose out. You can do it up to every two hours. Even if you don't feel stuffy, it will clear out any allergens before it starts problems. The side of my own Neti Pot actually says that pregnancy often causes worse sinus problems and rinsing is the best thing you can do for it.