Greetings.
A general criteria is that if you have to change your pad or tampon around every two hours or less, it is considered an indication to consult your physician, as it is significant bleeding. It not only is causing anemia because of blood loss but may be pointing towards some hormonal or anatomical abnormality. Since it has been almost 3-4 days, it warrants an examination by a doctor and may be some investigations.
Dr. Arun
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