Energizer is all i need.
Before I could realize, it was already the start of the second week of my third and last system of the semester. Everything seemed so fine until I noticed the most important exam ever is in less than 6 weeks time. I have been tired. Everyday. For the past one week, I had troubles going to bed. And I did not feel like I have got enough rest in the morning. I had no clue why it happened but eventually I figured out a few possible pathogenesis. ( I assume this is abnormal and unhealthy, so I used the word 'patho-'.) It was the first week of the new system and I had three morning sessions as early as eight in the morning. And I did not have any naps in the afternoon. This might be one of the reasons why I feel tired all day long. However, if I was really tired, I should fall asleep easily at night. But it turned out to be the opposite. I tried buying myself drinks in between lectures, just so that it might help waking me up. But apparently it did not help much. In the end of the