Regular bleeding 10 years after menopause

Towards the end of my periods I had an endometrial abulation after my doctor insisted I stop taking the pill despite telling him it would result in a blood bath each month. It did hence the surgery which worked for about 6 months then the bleeding returned with a vengeance. Luckily menopause came along eventually and for roughly 10 years no problems. The earlier this year spotting started. After the second time I was booked in for a hystio???? and d&c. That was in June and I was told everything was okay. Since then every 2nd month I have had cramps and bleeding, getting heavier each time. Last time lasted 12 days. Doctor was not overly concerned when I told him. Tonight it has started again only a month after last time. Does anyone have any advice I can throw at the doctor when I see him again Friday so I don't just get fobbed off again.