Girls, hello, I want to ask, has anyone ever encountered my child's al…

Girls, hello, I want to ask, has anyone ever encountered my child's allergy, it's very strong to dairy of any kind and to fish, and possibly to peach, the reaction is immediate, swelling starts from there, due to this we have a constant hypoallergenic diet...I'm so sorry for my little one, like all children can't eat only what he can, 1 year and 6 months old, constant fear that something is not right, he ate it! Will there be an allergy? And I also eat something wrong, I sit watching but as I noticed through my milk, there is no allergy, although I eat both milk and fish...If anyone has ever encountered it, how did you fight with