for now don't worry doll.
It's called lowline placenta.
You're early in pregnancy and the chance of your placenta moving on it's own is great.
At my 20 week scan they saw my placenta was only 1.5cm away from my cevix, wheras most are about 3 or so, I think that's how he explained it anyways... I just know it was 1.5 something and called lowline placenta

.
next Monday I have my follow up scan just to be sure it moved.
but definitely look at the site about placenta previa , because it is a possibilty and it's very informative.
A few words of advice , because of where your placenta is sitting... you can possibly bleed/spot easier ... be sure to be extra careful and gentle if engaging in any of the fun stuff , and just take it as easy as possible, that doesnt mean bedrest or anything drastic , just take your time with things and be especially easy on your body. They'll most likely do a follow up scan in a month or so , maybe sooner maybe later to see how things have progressed.
Good Luck!