Yes having cysts can cause you not to have a period. The clusters you refered to, sounds like you have PCOS. Most of us have cysts, although some of us do not. Birth control pills do help. They will cause a period each month and sometimes they do clear up the cysts. Follow up with your gyn, the ER docs generally don't know much about that area so all they do is give pain meds and thats it. See your gyn on the options you have for making the cysts go away and other meds you can take. Make sure you tell your doctor about your family history, so he/she will make the approite choices on any further testing.
i am so sorry to hear about this,but i have a simillar problem,i found out about a year ago i had polycystic ovaries but only on my left side,it bothers me from time to time sometimes 4 months with no peroid then when it comes with lots of pain and its so heavy with lots of cloting and it goes on like forever.when i visit my gyno i'm always placed on birth controll pills.i have been trying to get pregnant for 3yrs now no luck.i am also sick and tired of this condition.noone in my family has this prob except me.i feel sorry for you and i hope you can get some help. ..gud luck..