I think the best way to work through this is to bring it up with your T. Just tell her you need to take it slow. T's are professionals and it's not like they havent heard it all. They are trained to help people with the things you are going through.
I know bringing it up makes it feel real and almost like you're going through it again. But just remember, that time in your life is over now and the memories are shittty to have to deal with but they can't hurt you anymore. They're just memories. You're safe now.