What Are The Symptoms Of Having Ovarian Cysts?

Hi, I started my period last thursday. I had cramping and swollen breasts for the week prior to starting like normal, but more cramps than usual. I bled sort of heavily for 3 days, it stopped on the 4th day with some spotting discharge. Since then I have been cramping sometimes, and now my abdomen on either side is very sore, I don't know if these are my ovaries that hurt. Could I have ovarian cysts?