i have no idea how this works but im depressed

Im not diagnosed with depression...but symptoms are pretty obvious, same as social anxiety. Right now i feel completely empty inside, i should be studying for tomorrows test but i literally cant because i feel numb and weak. Social anxiety is another problem, i feel like noones ever going to accept me, they will always judge me. Lately ive realized that i dont know who i am, mostly im just a guy trying to be likeable, not in the obnoxious way of course, but im always over analyzing peoples behaviour so i can say something that they will think its appropriate.