To Better Health

Can ovarian cysts prevent your period from coming? I went to the doctors and had an ultra sound,due to my missed periods.And It showed that I has multiple cysts on both ovaries.I have no other symptoms of PCOS,and the doctor said nothing about it.Just that she would put me on birth control and provera,and that I was perfectly fine.I just turned 18 and I have always been regular and healthy,what causes these cysts and how do you know if it’s PCOS? is there any other types of Ovarian cysts that do the same thing? (without PCOS symptoms..Acne,weight gain,insulin resistance..etc) I’m very confused about all this,and I want to know what I should be looking for,Incase I do need to get another doctor.