Hello everyone. Can you tell me who fed or has been feeding our baby? …

Hello everyone. Can you tell me who fed or has been feeding our baby? We've been exclusively breastfeeding for almost a month now and everything was going well. Today, our daughter slept for a long time, but milk came in, so I sat down to express... I felt kind of embarrassed, but it seemed fine, but closer to evening, I started feeling very much pain in my chest and it was so hot, and I felt like I had a cold, there were no temperatures, but my bones hurt and my chest was so hard (it hurts to touch) and slightly red (?). I used to express about 30-60 ml from one breast, but today I expressed 120 ml from