I also become blocked, withdrawn, and unable to decipher what is running rampant through my head at times. Things that have helped me :

- Fidgets. Holding, rubbing, and looking at a rock somehow enables me to get things out.
- Quick connection. My t might tell me something that happened to her recently, or we'll engage in a little casual chit chat to "bring me back" and calm my nerves.
- One word. My t will ask me if I can get just one word out about something. Then she will start asking questions around that one word which eventually unblocks me and gets me talking.

I hope you and your t can find something that helps you out soon. Good luck!