Can you find a therapist? My DD saw a cognitive behavioral therapist, and this was one of the big issues they tackled.

"She is so fragile right now" -- that's very accurate to our child at age 9 & 10. CBT was rough (DD fought it many times), but so worth it.

The new school is an adjustment as well. There was likely a honeymoon period that's wearing off. How's the social picture? Is she finding friends who feel like good fits?