hello mam,
you got two things according to your usg report
1.bulky low lying uterus,
2.cyst in ovary,
you need to under go
colposcopy examination by which exact picture of your uterus and ovary could be seen,besides few
hormonal tests which will tell about about the exact cause of your irregular period,presently you need to consult a gynecologist who will exactly guide you, since your question does not tell about your
estrogen,
progesterone,FSH level,
this is a minor problem faced by various ladies,it could be cured so get consulted,
thanks