I seem to have gone and changed while I wasn't looking. Late last year, I found out that the department was going to make it a pain to graduate as a chemist* so I started looking at my other options. Then I went to compare those to what I'd get by pushing through, and what it would do to my potential career paths. I realized that I couldn't figure out how to weight the options because $careerfoo no longer has emotional resonance.

I'm willing to consider the possibility that I've lost my way in this mess because I'm burning out on school and that's interfering with my ability to care about anything related. But if so, the fix is the same - do something else for a while and come back fresh.

* The American Chemical Society has tight control over their curriculum, so there are few class substitutions. For reasons unknown beyond 'the committee refuses to schedule them', there's also a shortage of slots in required 1-credit labs, some of which are spring-only, and others fall-only.