Re: what i've dreaded:
Jess, on one hand I'm very sorry this happened. But on the other hand, maybe it's a good thing. As you stated, she will be closer and will have a family friend as her doctor. She will get the best of care, I'm sure.
When you said you saw a different look in her eyes, I immediately thought of my grandpa and grandma and the look in their eyes when they got to that stage. It was like a lost look, like they were trying to figure things out. And yes, I saw the tiredness too.
You said you feel peaceful about it. I suspect because now the stress of having to make that decision has been lifted from you and placed into the hands of the professionals. For the first time, you aren't the one having to decide. And you won't feel guilty about it because you didn't make that decision. Whatever the reason for your moments of peace, cherish them.
As always, my prayers are with you.
Live, Love, Laugh.