Hcg levels decreased

Adanyah

Hey girls well 3 days ago I had a ultrasound I was supposed to be 9 weeks and 2 days my hcg levels were 15,745 they didn’t see a baby nor heard a heartbeat , they only seen the sack. Today I did another blood test and my hcg levels were 11,800 . I’m pretty sure I miscarried💔. What do you guys think ?