Postmenopausal bleeding or abnormal uterine bleeding to be investigated by following steps
1,proper history for hypertension or
diabetes
2,last menstrual bleeding cloth passage or bleeding pads count
3 PT generalized condition
4 ultrasound of pelvis shows size of uterus ,endometrial thickness
Per vaginal and speculum examination
And then
Fractional curretage for histopathology
Cervical biopsy SOS
Then blood investigation and then plan of management, kindly consulty gynaecologist as early as possible