If you are sexually active, you may have had an incomplete miscarriage or an iud that has dislodged.
Infection, a fragile cervix, fibroids or tumors can cause bleeding. You also may have "dysfunctional uterine bleeding", cause unknown. Progestin may be used to stop uterine bleeding acutely. See a gynecologist asap. You may need antibiotics, ultrasound, biopsy, or a d&c.
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