I really have no idea how my self esteem ended up in the crapper

it's been a rough couple of months for my emotional and mental health. even after the stress lessened, i still found myself crying in between classes and at night when im by myself and the days activities are over. even right now it's hard for me to keep writing this and not to just regress back into my mind. at the moment i have no control over my thoughts and they just tortured me until im numb and i sleep to get away from it. im doing my best, talking to different people, taking advice, keeping busy. but i dont know for how long this will continue