In the last 31 days i have only had 8

Patient: In the last 31 days i have only had 8 sporadic days where i have not bleed. My doctor ruled out a failed pregnancy, checked my hormone levels which were fine and did a smear test. I am 30 years old and had a failed pregnancy 6 months ago. I have also had mildly irregular smears in the last two years which we check regularly. Is there any other medical reason why i am still bleeding or is this just an odd cycle.

Doctor: