Hello everyone. Today something strange happened. My daughter ate and …

Hello everyone. Today something strange happened. My daughter ate and fell asleep. I put her down for about 10 minutes and she suddenly started crying. She usually doesn't cry like that. I rushed over, took her in my arms as she calmed down, placed her on a chair to check the diaper. And I see that my daughter is slightly lighter than usual and has blue lips. Her legs are also blue. I was scared. I lifted her up and she jumped back sharply and everything went away. What is this? Should I go to the doctor and what should I pay attention to? We are going to the polyclinic soon.