I'm the exact opposite of what is happening to you. I had a miscarriage & D&C July1. I have not had a period since! My dr said I should have gotten one 4 weeks after the D&C but still nothing. I am starting to get worried.... and I did take a HPT and it was negative...
It can take you body some time to get back into routine after a miscarriage. I remember after my 2nd and 3rd miscarriages my cycles were off for at least 3 months. My doctors always said that it normally take 3 cycles to get back to normal. If you are very concern you can contact your doctor.