Such symptoms can be caused by endometrial polyps or hyperplasia
so you should be examined by ultrasound. However ovarian cysts can be also a reason for such menstrual disorder
because of hormonal dysfunction. You should go to your doctor as soon as possible because it can result in anemia with immunity dysfunction, etc. Sometimes it can be corrected prescribing oral contraceptive pills
, hemostatics, vitamins, spetial diet, etc. but you may need hysteroscopy
to manage such problem.
Wish you Good Health
Dr O. Aleksandrov