Ovarian Cysts

Ever since my second csection I started having ovarian cysts. Every month they burst and I bleed. My ob stuck me on birth control and I went on it for 2 months then the day I stopped taking it I was in so much pain and I started bleeding. I thought ovarian cysts came once a month ? Everytime I get an ultrasound or go to the er and get a cat scan on it  they have bursted and all they see are remains from the fluid in my abdominal cavity. Could something else be wrong with me ? I again this month stopped taking them and I am in so much pain. I hate being on something like birth control that isnt natural but I keep going to it because I cant take the pain. Its an everyday battle with how much it hurts me. He said when I get pregnant again it could stop the cysts is this true ? Has anyone had the cysts then had them go away after pregnancy ? Obviously they come nomatter what I dont have to be on my period or ovulating they just appear. Isnt this bad ? Does this sound like anything else going on? Any help would be greatly appreciated. Thanks