I have no idea how old you are and how long you've been having your periods. Also, you "did a survey for ovarian cysts"; so...you've been to a doctor for cysts or did you take an online survey to see if you have a cyst?
If you're a teenager or a girl in your early twenties, your periods might go through times where they are irregular. If you believe you have a cyst, go to your OB-GYN so this can be checked out.
If you are not sexually active, talk to your doctor about your periods. Don't rely on strangers from the Internet to diagnose you and don't rely on Internet surveys to determine a medical condition. See your doctor for any concerns you might have. Good luck.