Sounds like T needs at least consultation or, something. If you have been seeing her for 3 years, that means she has been a T for at LEAST that long. Even with a personal history, how has she managed thus far with clients who have abusive histories?

Client's should not need to worry about their T's 'stuff'. That's what supervision, consultation, training, and their own therapy is for... So while it may cause her heart ache to hear it (due to: triggers, or genuine empathy for what you're going through) the reason you are in therapy is to work out underlying issues.

I wonder about having an open discussion about your concerns for triggering her, and what can be done so that you can continue to do the work you need to do. If she is not able to take you through the 'rest of the journey' she should be able to find someone who can.