In most women the <span style = 'background-color: #dae8f4'>levels</span>
double up every 48 hours, but in
some it may take about 3 and1/2 days. If this trend is seen chances of pregnancy
carrying forward are high.
So, in your case, yes, it is a cause of concern. However, it’s too early in pregnancy
to give a definitive answer. While you wait another week for a clearer picture consult your gynecologist to find why you had a miscarriage earlier.