Oh gosh i understand your situation :c. At times like this, i would constantly remind myself that being 'stressed' will not give me the best results what-so-ever, cuz well.. im stressed, & so i try to calm myself by taking small breaks when studying :) (but ofcourse, try not to overdo it.) Also, i know this sounds weird, but maybe try not to '-hardcore focus-' too much on your work. You should listen to your surroundings while working , and it just .. surprisingly quite calming . I don't know if your already doing this, but i would also recommend trying not to 'compare' yourself with anybody, and also making a timetable to sort out your days and breaks? :D