Placenta Previa

Went for a scan today after a postive result on my penta scan. They found out i have a placenta previa and its conpletely covering my cervix. Im not to worried about a csection because ill already be having one anyways. But my main concern is since i have had 3 sections before they are worried my scar tissue may grow and attach to my placenta and cause abruption. Also ill need a hysterectomy because of this if it doesnt move. Anyone else have this happen and what should i expect. I am 19 weeks 4 days and have a house full of kids. Really concerned about a rupture. Any input or advice?