It is a category b drug: no harm seen in animal studies, no available data in human first trimester, and no evidence of fetal harm in 2nd or 3rd.
If your allergic symptoms are intolerable then rhinocort
is a good nasal steroid to use. Sometimes trying nasal saline rinses and washes ie:nettie pot is enough to provide relief that you may not need the rhinocort. Speak with your allergist re: options.