I found out the same thing last Friday Emma, so am in the same boat as you. My placenta was pretty much directly in line with the edge of my cervix, not covering, but very close.

My OB also told me that it will probably move upwards as I get further along, and not to worry about it at this stage.

I'm definitely hoping it does correct iteself, as I have my heart set on a natural birth and don't want to end up having a caesarian if I don't have to.