Hcg levels dropped

Jessica
Is it normal for my Hcg levels too drop at 9 weeks? I went to the ER today because I had some cramping. And my Hcg levels were 85000. And last saturday they were 97000. I had an ultrasound today and every thing looked fine baby's heart rate was 163. But I'm just kinda freaking out about my Hcg levels dropping this early...