Immortals Are Evergreen, My Proficiency Becomes Immortal

Fever, headache, cough... The worst thing is that I couldn't sleep for two days due to insomnia... I took a melatonin pill this afternoon and it relieved me for a while, but I still can't fall asleep, or I don't sleep well... I feel like I'm going to be useless. One day, I had no choice but to go to the hospital. (End of chapter)