Bleeding and dropping hcg levels

Ange

Took a test Sunday and got a very faint positive. Went to my Dr on Tuesday, where she ran blood. She called Wednesday and said i has low levels of Hcg so probably 3 weeks pregnant. After I got off the phone i started bleeding and went to the er. ER informed me my levels had dropped even more since the day before. Was discharged with threatening miscarriage. 😣😥 Not sure how to feel. Have to go back to Dr Tuesday for another ultrasound and blood work to determine if i miscarried or not