I have a cyst on my ovary. My periods have been normal, even since I was told I had the cyst. This month my period is now apprx. 7 days late, I am always ALWAYS using condoms 100% properly and have taken a pregnancy test to rule it out, it was negative, I m curious if the cyst is causing a missed period and if i should expect this in the future as well? I had the typical PMS symptoms, enlarged breasts, acne, moodiness, and my period never came.