Hello girls, please look at this allergic rash?

Hello girls, please look at this allergic rash? I'm breastfeeding, the pediatrician said that I might have eaten something wrong, but I was eating normally. Nothing new like I ate. Maybe it could be from chocolate cookies ??‍♀️ It has been four days and the rash hasn't gone away and it spread to my arms. There is no fever ??‍♀️ I'm going to call the doctor tomorrow, just interested in your experience. What do you think, allergy or something else? I can't calm down for some reason, I've been sitting on rice for four days ?