I don't think I would survive therapy if I couldn't inject my laugh, jokes and smiling. I mean I don't think I've ever walked in there not grinning like a kids I a candy store I attempt to convince her and the ready of the world that my week was just wonderful.

Like TheBunny said, t's are pretty good at reading people so it's likely that it will be picked up that you are nervous when you laugh. I don't think anyone goes to a t for the first you're not being nervous.

And also, don't worry about having to, our trying to force yourself to get into things too much on day 1. It's mostly a meet and greet so if saying the exact reason you are there feels too uncomfortable and nerve wracking, you can summarize.