You aren't triggering her, she is being triggered. Everything that is happening is happening in her head. She isn't owning her issues. She's blaming and projecting. That is a like fighting an uphill battle on a greased slope. You can't do anything to make that better. You can't "act right" or apologize enough for that. Everything is "your fault" no matter what.
A break with no contact may be what YOU need. You need some time to stop beating yourself up. You need some time to live in reality land and not PTSD world. Heal, rest, self care... spend time with friends and family. Go out and do things she wouldn't do. Take some time to think about if this relationship is good for YOU. What is it doing to YOU. Relationships are two way streets. Besides saying "I love her", what benefit is in it for you?