Your history and your symptoms suggest that you are going through a phase of hormonal
insufficiency. A complete hormonal profile and a pelvic sonogram will help to exclude organic causes. If everything is fine, you should do well with a course of styptics and progestogens. You may also get your blood profile and urinalysis
to look for other possible causes like urinary infections, clotting and bleeding anomalies etc. Hope you find this information useful. Wish you good health.