I don't think it's too late for you to go home. When I was in high school, I sometimes went to tutor at night to make up lessons. It's already ten o'clock when I come back, and I can watch it for more than an hour. Of course, I was sleepy. I don't know why I dozed off for a while around eight o'clock. I want to stay awake, but I can't. I summed up my mental state. When I want to sleep very early, I am not so focused on my studies and my grades are not very good, so I subconsciously feel sleepy. This vicious circle makes me want to sleep every day. But if I really survive this time, I won't be so sleepy in the future. The efficiency is much better.
I can understand your grade three. I sometimes fall asleep while doing my homework. Wake up in the morning, there are still some problems that can't be done. It is normal to get up at five o'clock and continue writing. Occasionally, it's ok, but if you do this often, your biological clock will be disrupted, and maybe you will be in a bad mood during the day. You think you get up early in the morning to do your homework, and then you have to go to class for a whole day, which wastes a lot of energy. How can you stand it? Just don't.
First of all, you have to overcome this inertia. You always feel tired. Of course, you are sleepy. You have to hint to yourself that everyone is just like you. How do others get through it? You are only temporarily tired, and you can adjust to it after a good sleep at the weekend. Moreover, your continuous mental illness is naturally sub-healthy. It is best not to take any oral liquid or any chemicals. If you really feel bad, you may be tired. You can go to Chinese medicine to learn about it and get rid of some nourishing and refreshing drugs.
Forget it, since you have shown that you are also an active child who loves to learn because of this distress, you should be so worried. You should grasp yourself, adjust yourself and give yourself a little confidence. You can do it.