Girls, hi everyone! Just a cry from my heart? My little one is turning…

Girls, hi everyone! Just a cry from my heart? My little one is turning one soon and we're preparing for it, I'm so happy, now we have a rash all over our body, everyone says it's allergies, we started with teething too, we had stool tested for a week... We're only on hypoallergenic formula, she eats nothing but lactose-free mush and vegetable purees. So thin ? We can't even eat fruits. Well, why is that? What am I doing wrong? I feel like a terrible mom who can't do anything, I'm so tired ??