I freaked out over a poor test grade and actually started crying in front of everyone.?

go back to your teacher and ask is she is 100% SURE you can't retake the test. if you can't, sorry but i have to say, get over it. that's all you can really do. just move on, and tell yourself that you can totally do better next time. i mean, you've never gotten below a 94 for goodness sake! you and i both know you can do better, so just remember that. and as for crying in front of everyone, who cares? it'll blow over. everyone has off days.