Menstrual Migraine or Menstrually Related Migraine: This condition is characterized by headaches that occur during or around the time of menstrual periods, often accompanied by other symptoms such as eye twitching, cramping, and neck pain due to hormonal changes.

Premenstrual Syndrome (PMS): Symptoms include headaches, cramping, and mood changes, which align with some of the symptoms described. Eye twitching can occasionally be associated with stress or fatigue, which are common in PMS.
Tension-Type Headache: Often involves neck pain and can be exacerbated by menstrual cramps and stress, potentially leading to eye twitching.
Dysmenorrhea: Characterized by painful menstrual cramps, which can also lead to headaches and possibly neck pain due to muscle tension.

Subarachnoid Hemorrhage: Although less likely, a sudden, severe headache (often described as "the worst headache" ever) could be a sign of a subarachnoid hemorrhage, which is life-threatening. Eye twitching and neck pain could be associated with the intense headache.
Meningitis: Inflammation of the protective membranes covering the brain and spinal cord, which can cause headache, neck pain, and potentially eye symptoms due to increased intracranial pressure.
Pituitary Apoplexy: A rare but potentially life-threatening condition involving the pituitary gland, which could cause sudden, severe headache, eye symptoms (including twitching), and possibly affect menstrual cycles.

Ehlers-Danlos Syndrome: A group of disorders that affect connective tissues supporting the skin, bones, blood vessels, and many other organs and tissues. Some types can lead to symptoms like joint hypermobility, which might contribute to headaches, neck pain, and potentially other symptoms through various mechanisms.
Fibromyalgia: Characterized by widespread musculoskeletal pain accompanied by fatigue, sleep, memory, and mood issues. While not directly linked to menstrual bleeding, it could exacerbate or contribute to the perception of other symptoms like headaches and cramping.