Yes, I was also nervous whenever any of my babies had to go too the vets, not so much when it was just for their shots, but when they had to stay in when I had them fixed.
I cried when they brought my Chipper out to me after he had the big snip, snip.
Even though you know they are going to be okay, you still can't help but worry about them. That's what Mom's are for.

Let us know how Remus is doing and of course can't wait to see pictures.