You lost it yourself, not stolen. Even if there is conclusive evidence that someone took yours, it is much lighter than stealing.

Yes, the police station in the area where your school is located will record your confession and help you file a case. It may take about 1 hour.

However, I am very busy, and there are many cases of murder and arson. How can I help you solve a lost case? Besides, your clues are limited.

My own experience, I hope you can improve your attention in the future and don't forget valuables again.