Are you past-focused or present-focused? What successful people realize is that what has happened in their past is part of their story, but they don't let it inhibit the success they know is near. They live each day with a clean slate and drive their focus towards designing their future.
No matter your past or how bad it was, it does not have to define who you are or who you choose to be moving forward. Your past is just that; it's done and over. Shift your focus forward and decide who you want to be and what kind of life you want to live, then go get it.