Finally defined.

Zielschmerz

n. the exhilarating dread of finally pursuing a lifelong dream, which requires you to put your true abilities out there to be tested on the open savannah, no longer protected inside the terrarium of hopes and delusions that you created in kindergarten and kept sealed as long as you could, only to break in case of emergency.

I'm feeling a lot of zielschmerz as I begin the last quarter of classes and the beginning of my career is ever nearer.

*http://www.dictionaryofobscuresorrows.com/