Now that you may have recognized help is needed in your life, how do you know where to go to get the right help? There needs to be an internal connection (trust) for this to work. Frankly, it can be quite a circuitous path to find the help you need.
A search through your past is not meant to assign blame; it is, rather, a mature look at your family to discover what might contribute to depression. It is so important for you to be able to identify the burdens from past relationships that may be slowing down your rate of recovery.
Sadly, many of us grow into adulthood with a list of childhood truths that can include many false and incomplete truths. Families, for good or ill, give us our first lessons about ourselves.