Hi Anjali you need to take rest, Avoid travelling and getting physical, if the placenta is covering the internal OS then normal delivery is not possible. But you are just 21 weeks pregnant and placenta may go up.

Hi<br> Please read this article <br> <span style="color:#3B5998;"><b><a href="http://app.babychakra.com/article/3216">Low Lying Placenta: Facts You Should Know!</a></b></span>