How To Treat Sneezing Caused By Allergy?

hi doctor i am 32 years old , i have allergic to cold air, which is more severe in the morning, i consulted the physician they given me nasonex, when i take the nasonex it gives me only temporary relief. my concern is that i am planning for pregnancy since one year, i couldnot so far, i worried that it because of the severe sneezing, we consulted gynaecologist for any other problem. but all the result seems to be normal. i like to get permanent relief from the sneezing . taking corticosteroids while trying to get pregnant will affect or not? give me some solution to get relief from the sneezing and to get pregnant soon. thank you.