Hello all. I had an early mc 5 weeks ago, my hcg levels went from 315 to 100 to 16 in a week, with the mc happening naturally between the 2nd and 3rd blood test. I had very light bleeding last week which I assumed was my period. So today I did a test just to make sure that my hcg had gone back down completely. fully expected a negative, but it was positive. Can it take over 5 weeks for a hcg of 16 to drop to 0?