Hi,
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Do not delay in informing your mother about your symptoms to be able to take professional help at the earliest. You will need a thorough examination done by your doctor/gynecologist along with blood and hormonal workup, ultrasound scan to look for the underlying cause and start you on appropriate treatment at the earliest. The causes could vary from anemia, bleeding disorders, clotting problem, thyroid dysfunction, etc. The treatment options would be decided based on examination finding and investigation results.
Take care.