hpymomof3, I understand how you feel. My 14-year-old dd has been training in classical ballet about 8 years. Five days a week, three hours a day, and going away to train in the summer. Over a year ago she came down with a virus that left her with chronic fatigue and she had to completely stop dancing. She could barely lift her arms. It was completely devastating for her and for me. Ballet was her life and my heart was broken for her. Long story short: even though her body was weak, her faith and trust in God grew in amazing leaps and bounds. She says she is thankful for having to go through this difficult trial in her life because it changed her for the better and her priorities are in the right place now. I'm so proud of who she is.
It's amazing to see how her ballet training has prepared her for other things. She can get up and speak in church with no problem. After all, she has performed in front of a couple thousand. Right now she is helping to choreograph for our church's upcoming drama production. So even if she never went back to ballet, I know it was still worth all the hard work and investment. It will always be part of who she is and what she does.
I'm rambling on and on, but I just wanted you to know that I know how you feel and I know how difficult it is right now. A nice break and a good rest might be all your dd needs. And I believe that all your dd's hard work over the years has not been in vain, but will be beneficial to her in all her endeavors.
Best Wishes