My period is 4 months late. what could be wrong?

Menopause symptoms: Symptoms of menopause include irregular cycles (eventually becoming absent), hot flashes, sleep difficulty, mood changes, drier skin, vaginal dryness, loss of libido, night sweats, fatigue, hair loss, poor concentration, etc. Menopause would be the most likely cause of absent cycles in women over 45, but other concerning issues may also be present, so an evaluation by a gynecologist would be wise