are you sure how far along you are? is it possible that you are further in to your pregnancy than 8 weeks? I ask this because HCG levels during the first trimester will peak sometime around 9 to 12 weeks of pregnancy, at somewhere around 25,700 to 288,000 mIU/ml. By the final weeks of the first trimester week 13 and 14, hCG levels are finally on the decline, and will be at around 13,300 - 254,000 mIU/ml.
From there, hCG levels tend to continue the downward change into the second trimester. Druing the second trimester, hCG levels will drop first to between 4060 mIU/ml and 65,400 mIU/ml, and then will slowly decline until they hit about a range of 3,640 to 17,000 mIU/ml at the end of the second trimester, before the third trimester begins.
good luck and hope all turns out ok and you have a healthy baby! feel free to message or add me if you need someone to talk to ok...take care
Dropping levels are generally a sign of impending miscarriage. Your doctors needs to continue to monitor your levels. Have you had any ultrasounds done?