You just have to pretty much wait and see. Unfortunately there is nothing that can be done. Most of the time the placenta moves itself away later in pregnancy. Hopefully that will be your case. It's rather common. They found I had one at my 20 week ultrasound and I'm 27 weeks now and mine has uncovered already.
I'd read through and post on the high risk pregnancy board. I don't have any experience but I asked a question about a high maternal serum screen and I had lots of responses. Best of luck!
I also forgot to mention earlier there was another conversation about it but I don't know how to attach the thread. It's not that far back maybe if you look back 2 or 3 pages you can find it.
Re: Complete Placenta Previa Advice at 23 weeks
Best of luck!