Staggering

As far as my university career goes (at least the pass-degree part of it) I'm about 100 metres away from the finish line, but wow - it feels like I'm at the wrong end of a marathon. I only have to submit one essay and one take-home exam (which includes a small essay), then sit a Greek test and I'm done for the year. Done forever, if I want. (I don't want, as it happens.) Why does everything feel so impossibly hard and exhausting now, when I have so much behind me? Well... that's probably the reason...