I am sorry about your patient's plight.
For her anxiety etc, i have found NLP (neurolinguistic programming) very helpful - i would make sure that the NLP practitioner is not a "success coach" as a lot are but actually a caring practitioner.
As for the C/S, upper cervical stabilisation exercises can be tried. Think of it like lumbar multifidus training but for the neck. Gentle contraction for the deep segmental stabilisers, downtraining of the global, strappy muscles (SCM, scalenes, etc). Then add levers gradually etc.
Otherwise, treat her neck like a whiplash victim.