Placenta Previa at 20 weeks- anyone else?

I had my 20 week scan yesterday. My baby girl is healthy and everything is looking really good, however I have been told that I have a low lying anterior placenta. I've has one previous csection and a miscarriage last summer (mva treatment): will my placenta move up? Anyone have any experience on this matter? Is anyone in the same boat and feeling confused and anxious? I've had no bleeding whatsoever do far. Best wishes to you all xx