Placenta is low

Katlyn • Tue, Jun 02 • I'm 19 and this is my first child, we just found out its a girl!

Have any other woman been told that their placenta is low? I was at my 20 week ultrasound and she told me.it was a little lower than normal. But not to worry because most of the time it moves up by week 24. I'm just over thinking it and was wondering if anyone else experienced this?