i did not know

i did not know that is deppresion that is giving me this huge fear, oversleeping and discontinuity in my actions, and i have so many things to do.....
im quite worried, cause im not allowed to fail.i could loose my job, and my studies are going very wrong....
how do you manage to work and to learn?

it happens this way:whenever i have something important to do, ex: to study, to give bussiness phonecalls, or even simple things like choosing the outfits i could wear to go to school or out, when im in a supermarket and i have to choose between items i want to buy , i become anxious, i feel fear.Because of this i delay , postpone untill doing what i should, is no longer necessary, and the situation gets very complicated.