My period returned 6 weeks after my D&C. It's not unusual to still be waiting for one at 5 weeks, from what I remember. Do you know if your hCG returned to zero? My period came back right after my levels dropped down (I had been 11 weeks pregnant so it took a while). I am pretty sure I didn't ovulate for the first one, but my cycles resumed normally by the second period. I got pregnant with my now-16-month-old just a few months later - good luck to you!!