I need a little support and reassurance, ate a fear food but my anxiety is still taking over :(

Fish and seafood are my biggest fear food, I used to eat salmon and shrimp all the time as a kid and teen but ended up being too scared to eat it in fear of having an allergic reaction (my moms side of the family has seafood allergies) I just ate fried haddock tonight and so far I’m fine and I’m proud of myself, but I still feel like I’m not even out of the woods as I heard reactions to things can happen hours later and I’m scared I’m gonna wake up tonight not able to breathe and I won’t know what to do