Allergic Reaction

So I made a post last night and I ended up taking her to the emergency room and they said they were not too worried but unless she gets more symptoms such as throwing up or pain to bring her back. They also prescribed a medicine for itching. I tried calling her pediatrician throughout the day but she didn’t answer and now it’s closed. It seems to be getting worse but she seems fine so idk what do do now. Does anyone know if it is normal for it to be getting worse? They put the diagnosis as an allergic reaction to vaccines. ( 2nd pic is from last night to show difference )