Common things being common, fibroids, which are benign muscle growths of the wall of the uterus, can give you pain
and heavy bleeding.
Ovarian cysts can be related to ovulation, or benign growths, endometriosis and so on. To sort that out, usually repeat scans are obtained over 3 to 6 months to see dynamically how the cysts come and go.
Depending on your age, birth contorl pills are commonly tried to control heavy bleeding and pain.