Prevalin spray whether pregnant or not is brilliant. No steroids so no problem if your hay fever season is loooooooooooooooong like mine. Much cheaper ordered from Amazon but I think it's fab. The balms are good as well.
I've bought it OTC in supermarket without a blink and if I hadn't have been able to, would have gone back and got a prescription, with the added bonus then of using the mat exemption and getting it free.