Hello I share your concern. Looking at your description it could be missed abortion or threatened abortion as well as other rare cases can t be ruled out. I would advise you to consult gynaecogist immediately for physical examination like recording of blood pressure as excess blood loss can lead to hypotension, and an transvaginal ultrasound to look into uterus and cervix to see for retained product or product of conception. you may require iron folic acid supplements or blood transfusion according to blood loss. In my opinion within wasting any further time you must immediately seek medical help. Meanwhile maintain good hygiene, use sterile pad and have lots of fluids to maintain good hydration and urine output. Hope this answers your question, please feel free to ask for further assistance I will gladly answer you. Best wishes