5weeks pregnant, hcg levels went from 39 to 12 in 48hours. am i going to misscarry?

Time will tell...: We hope for the best outcome, but any woman may have a miscarriage as a normal part of life. If a woman has recurrent miscarriages, there are some known causes (other than really bad luck) such as genetic disorders (like a chromosomal abnormality), autoimmune causes (like anti-phospholipid syndrome), anatomic causes (such as a malformed uterus), and environmental causes (like smoking).