Dear Alison, this is not a step backwards at all, PLEASE this is teenage behaviour.
Mums fade into the background with kids this age. I know I,ve done it 3 times and survived.
One day you will realise that your daughters are the closest and most caring people you could ever meet.
For now she is spreading her wings, wanting to stand on her own two feet, like we all did at that age.That shows you have done a good job in preparing her for her independance. Isn't that what "rearing" children is all about virtually from the day they are born we raise them to grow up and eventually away.
She certainly is no failure and a very bright child. I guess she wanted v popular uni's and courses that they can pick the crem da la crem from.
She will find a place I am sure. Failing that if she wants to do med, or vet or whatever she can always do resits! I know not what she may want.
She called you, so be thankful for that and your time will come when she needs your help and support.
It hurts I know and probably more so with what your going through as well.
Be proud of her and just take a back seat for now.
Many congratulations to you and her on her achievements.