How do I remedy this?

For the last few weeks I've been going to therapy and talking about lots of 'horrible' things with my T, although I haven't told her the extent of some of the horrible things I've experienced, but whilst I'm speaking to her I'm fine. I can speak about things quite casually and then pretty much as soon as I leave the building I realise that I've triggered myself be speaking about all of these things and then spend the next few days either stuck in the past, or overwhelmed and panicky. The problem is when I 'm talking about these things I'm fine and I want to share things with her in order to get over all of this. How can I avoid triggers when I don't respond until afterwards!?

Mindful Moment