Hi,
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It is difficult to comment on your symptoms without examining you. Consider visiting your doctor/gynecologist for thorough examination. Pelvic/vaginal examination done will confirm if the cervical os (cervix mouth) is open or not. If found to be open, possibility of ongoing miscarriage cannot be ruled out completely. HCG test and ultrasound scan done will also help to confirm the findings. If retained products are seen in uterus, you will have to go ahead with getting a D&C (dilatation and curettage) procedure done to clean the uterus and stop the bleeding. Do not delay your visit to your doctor/gynecologist for further evaluation and assistance.
Take care.