I don't want to end up someone I don't even know

I'll admit it, this finals week is tiring me out a little bit. I went on a huge binge and saw 4 sunrises (missed one by about an hour) in 7 days. Of course I reap the benefits of doing not quite spectacular on my tests. Alas, that 40 hours for physics didn't quite add up to a smile. Perhaps I can bank on the character that was built while putting myself through torment.
I've got 2 more tests in about 30 hours (differential equations and macro-econ), then I'm a free man. I almost switched to my major to physics and econ (from a purely science field), but we'll see how the grades turn out. I guess I got an A in lab, which is nice. I have none of the prerequisites for the lab I'm taking next semester. It should be a good time.
I gotta go see a prof in 10 hours, then study for like 15. How swell.
On the upside I'm not totally hating my subjects. Maybe a career in science in fact does await? Applied optics? Econophysics? Fluid dynamics?
Oh the places you will go...