Embrace my Darkness

I'm very hard on myself when I make a mistake.  I made a mistake recently by losing control at work, and it could possibly cost me my job in worst case scenario.  Now, I'm worried.  If I lose my job, I'm afraid I won't react well.  My best friend says she doesn't think I will, and I do have support from others who think I did the right thing, but I know I went about it the wrong way.  I just feel like if the ground isn't shaken in a sense, then no one makes a move.  This hatred I keep locked inside is very tiring...I just want to get rid of my feelings.