This sounds like it may be difficult to write. Do you have someone helping you with your essays?
I don’t know what type of trauma you have experienced, but you want to avoid an essay that is based too much in the past, or one that might be painful for the reader to read, or one that’s ultimately not positive. I typically encourage students to not write about mental health challenges. Lastly, you don’t want AOs to feel sorry for you.
With that said, of course past experiences have shaped us all. You can have a couple of sentences max on a parents divorce, or that you were bullied, or experienced the death of someone close to you, etc. But then you have to move on in the essay.
Make sure to spend 90% of the essay on who you are today…and do not forget to address the type of academic student you are. You want the AOs to feel like they know you and understand how you will fit into the school and class they are building.