Hello, moms! Has anyone experienced allergies when switching a baby's …

Hello, moms! Has anyone experienced allergies when switching a baby's formula? We are 6 months old. For 5 months and 3 weeks we were exclusively breastfeeding, but due to exacerbation of chronic disease in me and taking appropriate medications for breastfeeding, I had to stop. That's how it is now...We started giving formula milk, complementary feeding (complementary feeding started even during breastfeeding), in general, we bought hypoallergenic formula (Similac). It lasted us a week, considering complementary feeding. Then we took another ordinary one (Nutrilon). In the end, everything turned red, ears swelled up, arms sometimes turned blue, even. As a result, we called an ambulance and ended up in the hospital.