Answer: Dissociative fugue.
Explanation:
Dissociative fugue is defined as the disorder in which a person is unable to recall the moments and events of his/her past due to amnesia. The disorder suffering person can unreasonably and unexpectedly go away from their home or native place and wander away by forgetting their identity.They often display their new identity by forgetting the original one.
According to question, women must be suffering from dissociative fugue as she is wandering away from hometown and her original identity was found after five years.