Odds of miscarriage vs still pregnant

Patient: I thought that I was 10 weeks pregnant last week, Went in for US the could see gest sac and yold sac but not fetal pole and no heartbeat. Sac was measuring at 6.6 weeks. I go back for another ultrasound today, what are the REAL chances that I have no miscarried? If any at all? Looking for a real honest answer so I don’t go in hoping for something that just can’t be. I have had no symptoms of a miscarriage. HCG last week was 17086.

Symptoms: No symptoms, just ultrasound reults