Procrastination Strikes Again!

In the sort of mood where I know I should be working, I am not tired, nor hungry or anything, just can't physically bring myself to do it. Aargh. And if at home right now instead of having snuck into the med school, I would be most likely sleeping, for no reason whatsoever other than boredom and hopelessness. Grrr...
Exams are in four weeks, will last for eleven days, and after that I will cease to be a student; something I've been for...my god, is it actually almost 18 years?! Where da time go? 18 years and then freedom. Heheh, I may actually go mad...
But for now, no freedom, just exams, and I'm going mad anyway. Strange thing considering I don't actually do any work! I haven't reached the point yet where I'm like 'Ah, screw it, I don't care what I get, just want this to be over' or the even more dangerous point of 'Urgh, I give up completely' but I anticipate it sometime in the near future. Right now in a more of a 'Life is so meaningful, but everything means nothing to me' type of mood, can't explain it, which results in bursts of great ambition and dips where I wanna do nothing except youtube. Actually anything but work will do which would explain why I'm on this again after so many months. How can one force themselves when every atom in their brain is resisting? How can I motivate myself? I know how to stay awake now, found a trick; standing up whilst reading ;-), but motivation...that's a toughy. So is getting up in the mornings in the first place - uergh, that is why I sometimes wish I were a computer. When you set it to do a task at a certain time, it does it, and it keeps doing it (unless your computer is kaput like mine, darn thing), it doesn't tire, or get bored. Is it impossible for a human being to be like that (within reason obviously), or is it just me?