night shift makes sense for her because she's a night owl to begin with. night terrors are relentless even with meds, even with therapy ( clearly night terrors can't get you in the day time soooo ). her body, her brain and internal clock were re-wired in the military; she can survive off minuscule amounts of sleep and still be high-functioning. that never leaves her, but that doesn't mean she isn't perpetually exhausted. it makes her ability to pull working doubles very frequently seem superhuman.