Hcg numbers

Hi all,

Went in for an ultrasound last week thinking I was 6+5, measured 5+5 with yolk sac and fetal pole with no heartbeat. Had HCG drawn on 6/2-21,700 and again on 6/4- 24500 . Doctor said we will wait and see at my ultrasound tomorrow. Anyone had experience with this? Should I just expect miscarriage at this point ?