Working my guided meditation

So I've been working on these daily guided mediations every day my therapist recommended. I'm really starting to understand the purpose of them and they seem to help a little. He wants me to do them  because we are going to start diving into some  traumatic events that I really  havent shared with anyone before.  He hopes that the mediation will help me from freaking out too much during our sessions ..I'm hoping so too cause everytime we ever start to talk about  some of the things i start to cry....alot of its painful