Yesterday's hospital visit

My boyfriend and I made our second visit to the hospital together for another UTI. Because my doctors was closed and I was in so much pain he drove me to the ER. After about 4 hours and 45 minuets I was free to go but with the knowledge I had an ovarian cyst. Now the doctor says it's nothing to be worried about but that it might flair up this time every month. And in 5-6 weeks go for another ultra sound. I wanna know more about ovarian cyst, dose anyone out there have any person experience with them?