I had a dnc 2 1/2 weeks ago due to a miscarriage. When will I start my period?

2-6 weeks. Variable, usually 4-6 weeks after a D&C your cycle will return. Not usually concerned unless 8 week and no cycle.
Miscarriage. If you were early first trimester you could ovulate as early as two weeks after miscarriage, having a period 2weeks after that bottom line you can have a period 3-4 weeks after miscarriage.