I'm sorry KSM.
Boy, I understand that disappointment, as LBL said, "down to my very core."
So often our hopes are so much higher than our kid's abilities to gain altitude.....sigh.....perhaps in the grand scheme of life, she's gained a new perspective which she can use as a big life lesson. I hope she's humbled by it enough to open her mind to new possibilities and begin, with your help in not enabling her, to find her way to being a contributing, functioning, healthy adult. She's still so young, there is so much ahead of her.
Hang in there KSM. This part will be over and a new chapter will begin. While she's still away, do kind and nourishing things for yourself.
Many hugs.....