Sleep and apathy

What is wrong with me?  In Scotland, I had so much energy and even though we were going all day long, I woke up so easily in the morning and was ready to go again.  Now, I can't PRY myself out of bed.  The past few days I've slept 12+ hours and only just managed to drag myself up an hour and a half after my alarm.  Every time I try to study for my upcoming exam (hello, one more day!), I can't keep it up.  My attention wanders, I get tired (yes, tired) and eventually, I wander away.  I can't make myself believe that this really is a grade, my only grade, and it really does count.  It's not as if I'm terribly off, I went to every class and I have studied, but I have NO indication of what the exam will be like.  I understand the ideas, but some of the particulars are lost on me due to fruity philosophical language translated into another language that I speak only passably.  I got home today and took a nap instead of studying and now, here it is, almost 7 and I have a long way to go.  I just want my parents to be here.  They arrived in Italy Sunday and are doing a bit of traveling around before they get to Ferrara this coming Saturday.  Oh, for a little motivation and a little energy.