I'm experiencing a crisis of confidence because of my hairdresser

Last week, I went to the hairdresser to get my hair cut, but the hairdresser cut it really short. Now when I look in the mirror, I don't feel beautiful at all, it feels like I've really messed up. Friends, how can I get over this situation? How can I feel better with such short hair? Can you suggest anything? My self-confidence is at zero.