Sharp Abdominal/Pelvicish Pain 13 days after miscarriage

I was 11 weeks and 4 days. Scan showed that baby stop growing at week 6-7. Just lost my baby 13 days ago. My miscarriage was natural. I stop bleeding 10 days ago, but today started to have a sharp pain. Could you please advise? What should I do? The scan after 3 days of the miscarriage showed to have cleaned 90%, doctor said that will clean by itself. What to do?