Lol,
as I don't suffer with the dreaded hayfever myself this is what I could find on it:
As a general rule, manufacturers of hay fever antihistamine tablets advise against taking them at any time during pregnancy.
In practice many mothers-to-be with severe hay fever do take them with few reported problems.
Overall, do not take any before discussing this with your GP or obstetrician, avoid taking them before 16 weeks of your pregnancy, and try to use nasal sprays and eye drops rather than tablets.
I sneezed and missed the L in help....... hahahaha aaarrrggghhh