Don't worry too much about a career. Worry about being happy. Life isn't supposed to be about work. We work so we have money to live. Our identity should not be defined by how we earn income. I know that's easier said than done but we are more than what we do. I agree with heyoni, chill out awhile. Your overall well-being should be your top priority whenever feeling down. There isn't anything you HAVE to do.