Is this the beginnings of puberty?

[Myotherhusbandisgaryoldman]

My lovely DD is 11 in February. The past couple of months she has become prone to little mood swings, tearful etc but tonight she has had a real emotional upset - saying she feels ugly, feels she is doing her schoolwork wrong, and basically is lacking in confidence and self esteem. I've done lots of reading on how to help her through and reassured her tonight that we will work through this together. For background, her dad and I are divorced but he had lots of contact.
Any advice or input would be much appreciated

Hi,my DD is 11 in March and similar to your DD. She seems fine for ages and then can start crying over something out of the blue. Which is very unusual for her!
I think it's the combination of a few things,secondary looming and puberty too.
Raising Girls is a good book if you haven't read it.