Advice please

Hi everyone. I've been putting this post off cause it seems ridiculous in comparison to some. We finally know what's going on with Dm's collapsing ankle, she has severs disease in her heel which is the result of her tip toeing. She has a aircast support which she has to permanently wear apart from while at home. Even since she has been over emotional or grumpy. She keeps saying it's making her different but I've explained if she doesn't wear it her ankle will collapse again. She also says it's making her leg itchy and hot. She also got emotional today as her levels from school have put her a year behindI told her as long as she's trying that's all we would expect. School are telling me she has times in the day where she's just staring into space. I know holiday anxiety is adding to her moods but I'm trying to help but she's not bothered. She keeps for getting things too so I've suggested new visuals but she pays no attention to the ones that are already up. I just don't know what to do xxx