Fiction from middle school about multiple personalities

[Megan]

Fantasy/fiction? I read it in middle school (about 2012-2014) so I cant remember a great deal. Mostly just that the main character had other selves? Kind of like dissociative identity but it was written before that was a common topic. The main character had to help her other selves find some semblance of peace and had to solve their issues, I remember one was under water? I really want to find this book because I remember enjoying it but i cant remember anything else.

[Rainbowheart]

Was the girl in the story middle school age?

[Megan]

Rainbowheart wrote: "Was the girl in the story middle school age?"

If memory serves me, she was, yes.

[Rainbowheart]

Pretty Girl-13?

[Megan]

Rainbowheart wrote: "Pretty Girl-13?"

No, while I wouldn't (based on my limited memory of the book) was a little lighter? There wasnt any sexual abuse that I can remember and some of the Others were abstract in nature i think. I think there was one tasked with the upkeep of a mental garden? I think i remember one of them being soggy?