Marginal cord insertion

Rosi

At our 20 week Ultrasound, the doctor said the baby is growing fine but she identified some abnormalities with my placenta like marginal cord insertion, anterior placenta and a low placenta. Does anyone have/had marginal cord insertion? It sounds like there is nothing to be done but monitor growth and development. Just freaking out a little. This is my first and everything is so new. Thanks!