Hi, I Have 7 Weeks 1 Day Pregnancy Detected In

Hi, I have 7 weeks 1 day pregnancy detected in ultrasound, but there is no cardiac activities found. today I.e. 31.10.15 bleeding for some time has been done after taking defestone tablet, it stopped. should I wait for one or more weeks or going for DNC. At the time of My first baby pregnancy was also confirmed after three months.