It's time to chill Mariah!
In the adult world, you don't need to be concerned about your orthodontist reacting to 'silly talk', if he should hear it. Your orthodontist is a trained professional and as such would never intentional 'mess' with your teeth.
I love your overactive imagination and it's fun to be reminded of how some things are such a huge deal for young people.
About the Z steps. Ask your ortho what these will do to your teeth and then if you need more information, ask why you need them. Mostly tweaking like this, results in small movement to help your teeth/bite fit together in a better way. This Z step doesn't sound like it will make a space, but more like it may improve your alignment. I look forward to hearing how your ortho describes it to you.
Enjoy your celebration and your adjustment!
