low position placenta

Mell

This is my third pregnancy, had my first baby then had a miscarriage at 9 weeks now 18 and a half weeks and just had an ultrasound found out my placenta is sitting in line with my uturus, Just wondering if people have experienced this and have had there placenta move up later in the pregnancy or have had complications. Just wanting to know things i could expect, doctor google has only worried me.