AITAH Unable to understand trauma

For context, my gf has hinted at significant sexual trauma in the past. A few weeks ago she casually said that she was sexually groomed in the late 90s. She was underage and felt like an ugly duckling compared to her friends. She has shared pictures of herself over time throughout her development and she was always beautiful.

I reacted badly, I have my own experience with trauma personally and from friends going through it. My gf played it off for jokes and in passing. I was triggered by this from my own and shared experiences. I worry she deflects what she has been through and genuinely worry for her well-being.

I broke up with her. I said things I regret. I'm not doing well myself and have signed up for therapy to deal with this and my triggers. Thing is I genuinely love her and have never been happier prior to this. These things I feel are awful. We have talked about buying a house together and getting married. Now we are at odds and I feel awful for it.

I know this is my fault and I don't know how to make it better.