Your post really struck home with me. One of the few moves of my childhood was in 7th grade (I was 12). I considered myself a fun and friendly person...also with straight A's (I found that made it harder sometimes, being the new AND smart girl), but was also a bit shy, especially in such a new and vulnerable environment. I remember crying every day after school for at least a week. It was horrible. I hated school, felt alone, and wanted to move back "home". I recall my mom coming in one day when I was so upset and said she was sorry I was having a rough time, that she loved me and encouraged me to stay positive until I felt better and I made good friends. I didn't really hang out with friends for at least 1 or 2 years, but I kept myself busy reading books and babysitting in the meantime.
Although it was a really tough time/trial for me, I believe it's shaped me into a better person today. I was able to observe others a lot and decided what kind of person I wanted to be and who I'd like to be friends with...definitely NOT the mean and self-centered groups. I also started ballet at that time and made friends there. I auditioned for the Nutcracker (didn't make it, lemon juice in the wound!), but did make other groups later on, which boosted my confidence immensely. Plus, I felt extra grateful for those experiences after the bitter ones. I eventually clicked with a good group of girls I'm still friends with. That's my story, which I thought you might find helpful (maybe?).
So, be patient with your daughter and the current situation. I'd suggest getting her involved in something she likes to do (as others mentioned) to allow herself to open up and boost her spirits and confidence, continue showing your love for her, make yourself available to talk to (she may not, but NEEDS to know that she can), and even suggest she pray for friends or at least to feel happy and comfortable in this new place. It may take awhile, but with your encouragement, love, and gentle guidance she'll eventually come out of her cocoon and fly once again!
Best of luck,
N.