It is important to validate that arguing is possible without yelling or shouting. For example, lawyer argue all the time, and hopefully without yelling or shouting.
There are healthy ways to sort out conflicts (much like is happening in this thread) but even healthy ways of sorting out conflict can be exhausting for people who have experienced dangerous conflict.
My trauma history makes me irritable when I get scared, and I also to avoid conflict and it takes a lot of energy sometimes for me to work it out well.
I also know that many of us have experienced arguments where there was shouting so much that it's hard to imagine anything else.
In the case of the original poster, @
tsadlerj, it sounds like the problem is that there are many arguments, and your girlfriend shuts down afterwards in a way that you are struggling with and feel hurt by? It sounds like she may associate arguments with danger, because that may have played a factor in her trauma. It can be a little like if her abuser wore a red shirt, then all people with red shirts will bring up anxiety, and that gets to be exhausting.
I also know that for me, it can feel dangerous if I am wrong. It is also true for me that I have a hard time accepting myself, and others acceptance of me is never quite enough to fill the void I have inside. It is changing for me in therapy, as it hopefully with your girlfriend, if this is what is going on for her.
Are there general themes of argument? like does it tend to be about one type of thing? (i.e. money, schedules, what to do when together, etc) or is it many subjects?