Ok Joanna, first things first, you need to create a timeline of traumatic events within your life. I say you need to do this, because you know what you perceive as traumatic opposed to what I would so. You said above that there are so many memories and traumatic events not listed here, so they need to come into the timeline. A timeline is a dot point outline, no specific detail just yet, for example:

• Age 5 - Father sexually assaulted me by fingering me
• Age 5 - Father made me perform oral sex upon him
• Age 7 - Boys made me strip and abandoned me naked to get home
• you get the idea

You need to create this list, starting at the age then the trauma you endured. Regardless how small, list them all. As more come to you, edit the list and add them in. This is going to shake you even more, but only an introduction to what your going to face. You need to ensure you keep very honest with me all the way through, ensuring you tell me everything that goes on within your life as a result of healing, ups and downs, and don't think anything isn't important enough to mention, because often those pieces are the key to immediate resolution at that moment.