It sounds from your posts that you have already refunded her?
If this is the case, then breathe a sigh of relief. She's gone and you don't have to deal with her anymore. You'll be double sure to make sure that clients understand this part of the consult and sign saying they'll agree to do what you tell them, from now on.
Don't worry anymore. Clear your head and do whatever you enjoy doing...having a relaxing bath, reading a book, glass of wine, chocolate, whatever...and forget about it. It is over and done with and if it ever happens again, you will be prepared. Your regular clients appreciate you and there is a reason for that xx