Cysts sometimes hurt - but not always. Clinical specialists can diagnose an ovarian cyst via pevlic ultrasound or Laparoscopy. I'd suggest that you see a gynecologist to follow up.
If you're in your childbearing years or past menopause, have no symptoms, and have a fluid-filled cyst, you may choose to monitor the cyst. You may need surgery if you have pain, are past menopause or if the cyst does not go away. Birth control pills can help prevent new cysts, which you've already experienced.
Good luck and let us know the results!