hcg levels 8618

So I had a little dark blood and red blood scare. Went to ER and they said I'm measuring 6.2 weeks when I was supposed to be 7 exactly. My hcg was 8618. I go to docs today for my original appointment and wondering if that hcg sounds right or maybe they are wrong on what they believe in dates. I'll find out more today and pray levels have went up. I've seen the chart and it looked to be around when I originally thought (7weeks). Prayers this baby sticks after miscarriages in past. What is yours around this and does this number seem ok? I went a couple days ago.