Is it too late to fall back and regroup for this whole term? Sounds like you could use a little help with a redesign of your upcoming career; I would not drop out/stop with trying to get my degree as it is so close but would use getting behind/the arm problem for all it was worth to get myself a breather?

Have you looked at graphic/industrial design at all? Not as cool as cars but there's plenty of work there? You could find some niche you like a bit better and fall back a term or two and revamp?

Musical instrument design? LOL: http://www.tufts.edu/programs/mma/emid/