Low hcg levels

10/9/15 My Hcg levels was 3,195.0 10/10/15 My Hcg levels was 2,132.0 Got and ultersound done on 10/9/15 heard the heart beat of 129 seen my baby I've been bleeding Need answers what's anybody think is going on I'm I heading down the lane for a miscarriage this is my second birth