How can just *thinking* make you this tired? After 6 months of this, I still don't know the answer.

One of these days I'm going to make an entry that's not about the boredom of revision or the unfairness of oral exams, but today is not that day.
This is mainly because I don't do anything at all at the moment but look at my books and take exams.
Occasionally I meet with friends for food or a movie but most of the time I'm parked in front of my desk for 17+ hours a day and don't leave the house except to go for walks with the dog or get some groceries.
And this is getting to me, like it is getting to the rest of my classmates. None of us eat properly, or move enough (or at all) and at least I am full of energy and bone tired at the same time. Mentally I doubt that there is anyone who would call me sane - but few would have done so before, so that might not be the best indicator of stress.

Luckily, the end is getting closer. Until then, entries like this will have to prove that I'm actually alive and have not yet smashed my head in with my texts about all the laws concerning pharmacological substances and animals (which I couldn't do anyway, because all of those texts are pdfs on my laptop and not actual books).