Hi,
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Sudden onset of vaginal bleeding after attaining menopause is not normal. It could suggest chances of underlying problems like hormonal derangements, DUB, endometrial hyperplasia, endometritis, cervical problems, etc. You should consider visiting your doctor/gynecologist at the earliest for further evaluation and assistance. Hormonal and blood work-up along with ultrasound scan done will help to identify the underlying cause. Get started on treatment as indicated by examination findings and investigation results. Be in regular monitoring and follow-up with your treating doctor/gynecologist and report any new/abnormal symptoms immediately. Drink plenty of water. Take adequate rest. Maintain healthy diet and lifestyle.
Take care.