Low hcg ?

I am what I thought was 5 weeks pregnant. I went for a transvaginal us yesterday due to mmc in July, all they saw was the endometrium thickening, no sac or anything else. They ordered bloods and the results came back hcg: 184 progesterone: 33. Please can someone help me with this as I don't know what to do it think! Repeat bloods tomorrow (Saturday) Thank you.