I often hear voices that don't exist in reality, such as the voice of short messages, the voice of my QQ confidence. Is some sad thing recently my depression?

Maybe it's because you've been under too much pressure recently, or you think too much.

Suggestions: relax, eat properly, exercise properly, keep the time and quality of sleep, and communicate with friends and family often. You will find that everything will change together.

I wish you happiness and peace!