Final answer:
Jenny most likely experienced postpartum psychosis after her miscarriage, which is a rare and severe mental illness occurring within the first few weeks after childbirth.
Step-by-step explanation:
Jenny most likely experienced a brief psychotic episode known as postpartum psychosis. Postpartum psychosis is a rare and severe mental illness that can occur after childbirth, typically within the first few weeks. It is characterized by symptoms such as hallucinations, delusions, confusion, and mood swings. In Jenny's case, the episode may have been triggered by the stress and hormonal changes associated with her recent miscarriage.