Low placenta/placenta previa

Amanda
Anyone have or had placenta that is low? Did it move on it's own? At my 20 week scan (at 22 weeks) my placenta was low and doctor wants to have another scan in a few weeks, to see if it moved. I was hoping to have a natural birth, so I'd love for it to move. I'm trying to not worry about it because it is what it is, but I'd like to be informed at least.