Allergies & Pregnancy

Hey Everyone!

I recently found out I’m pregnant, I’m about 5 weeks! I suffer from really bad seasonal allergies like to the point where I’ve had to use my epi pen in the past because of it. Has anyone here dealt with similar situations with seasonal allergies and have taken anything? My doctor kinda scared me when she’s like you can’t take anything maybe a nasal spray here and there but she never suggested a brand to me… she was also super against eating seafood I know that there could be high traces of mercury in tuna and possible salmon but to suggest not eating other seafood is kinda wild to me. Anyways if you guys have any suggestions or advice I’d greatly appreciate it