Answer: Anterograde amnesia.
Explanation:
Anterograde amnesia is the condition in which new memories cannot be created due to persisting amnesia that does not let suffering person retrieve recent past memory.Person can easily recall the long term memories of earlier past.
According to the question, Shera might be suffering from anterograde amnesia.She is able to remember memories before the crash but fails to remember recent memories of accident and doctor.
