Sorry things are not going so well at the moment... have you thought about Circadian dosing?  Although I’m not sure if it works as well with Dex, I do recall reading posts from parents who’ve had success in controlling levels and weight, and improving height gains using this method.  Perhaps some of these folks will post and give their input on whether this type of dosing will work with Dex.

Anything is worth a try, especially if she’s already being affected by hearing the Dr.’s comments on her weight.  It’s so easy for young people (girls especially) to develop a negative body image.  I know, I have one myself.   Hope things get better from here,