why do you cry for no reason

I just had a episode of my depression states and what not I don't know why but I just started crying randomly I'm always thinking in my mind the past and future and to be honest I'm ussualy always angry , no mood at all then changes in mood and crap I hate it I also hate life I don't know why I'm...

Recently I have been crying for no reason at all. It is doesn't usually happen when I'm with friends or anyone. It's usually when I'm on my own, for instance just doing school work. I have looked it up on the internet and other have discovered many other people have the same thing. Some people...

Why do I lock myself in? Every day I come home and just lock myself in my room. It's not because I want privacy from my parents. Also I close all the drawers, and the closet door, plus I close the blinds on my window and close the curtain on top of it. Don't tell me to try and leave the door open...

Lately I have been so emotional for no reason at all. I woke up this morning and was cryin my eyes out, got in the shower and was still crying, I went to work and jus started cryin for no reason! Am I pregnant? Or and I jus depressed? I have nothing to be depressed about!

Recently I've been crying a lot but for no reason. For the past few weeks its been happening on a daily basis. I'm so confused about why this is happening because I could have a great day but as soon as I'm home and alone with no distractions I get this horrible anxious feeling in my stomach which...