All a D & C does is remove the lining of the uterus. Your hormones are still going to be on schedule as they've always been. If you had your D & C last week; you may have ovulated and may still get somewhat of a period in the next couple of weeks.
I had a D & C about two days before my period was due; tender breasts and all; and after the surgery, I only spotted for a day or so and got to skip my period that month because the doctor removed it. Kind of nice to miss it for a change!