Horrible day at work. Please need kind words.

Today was the second day of school for us in aus. It was the first day that I went public about my pregnancy, I was feeling super vibrant and happy.

Until I made a huge mistake at work which required an immediate meeting with the principle. Nothing that harmed a child or anything like that, but goes against school policy (we are independent). The whole day I felt horrible. My day of revealing my pregnancy went downhill. I felt like all eyes were on me. How do you get over making an unintentional mistake at work?