Nervous about my companion.

I don't know what it is or what to do. I've been nervous about going to get my puppy. Nervous about going on the plane. Nervous about actually going there. Also, I'm nervous about the puppy. How am I supposed to pick? How do I know it's the one for me? I love Chis and have done a lot of research into them before delving into this process but I still can't help myself.

There have been a lot of dogs in and out of my life. I still don't know which is my *particular* breed.

Pretty much worked up for probably nothing.