My brein stop working

Today, I've studied English too much. I studied for about five hours! After that, I've got a little headache. I came back home with Daria, at that time, my brein'd stopped working. I tended to ask if she had any plan at the next day, but actually, I asked her if I had any plan the day before. She laghed at me, and said, "Wake up, Nozomi!"
Incredibly, after I came back home, I studied English again for about three hours! Probably, I am a little upset now...