Don't be stressed. This is his job. I'm sure you will not saying anything he has not heard before. Your T needs to hear about what is going on with you. Most of the time we are nervous about saying things because it is our stuff and embarrassing or upsetting to us. We forget that our T has probably hear it all before; it takes a lot to shock them. Write it down and hand it to him if you feel you will be too nervous to say it out loud. Good luck. You will be fine and I'm sure he will be kind.