Don't worry a bit! It is very, very normal for them to not eat right away in a new environment.

Just give her a couple days. On the third day of no eating, I'd start to get concerned.

Sometimes its easier if you start them out in a small room. Once they're used to that room, you can let them venture out into the house more. If they get scared, they will at least have a room to go to where they feel safer and more comfortable. You might already be doing that though.

Good luck and don't worry!