Trauma is also pretty silent. A traumatized person can cover up symptoms until they are triggered or get too upset. It sounds like her childhood is grounds enough for ptsd. It also sounds like she's already told you a lot of things she wouldn't tell anyone else. She'll tell you what she needs to if she wants to, when she wants to and really, all you can do is comfort her when she's upset. Let her do whatever she needs to do to recover or calm down. And just remember many of her outbursts won't be personal, they'll be a side effect of whatever distress she's facing. It sounds like you guys are a very healthy couple and this is just a bit of a roadblock that you guys will get around. I wish you the best of luck in it.