Hi tvmum, sorry to hear that your DD is feeling sad. From speaking to other mums with teen daughters it does seem to be quite a common issue, not that that makes it any easier to watch.
I used Ferndale for my daughter. They seemed very friendly and my daughter liked the woman that she saw. Sorry I can't remember her name as it was a couple of years ago, she was quite young which I think my daughter liked. She saw her a handful of times.
Wishing your daughter well.