My mother had a hysterectomy at 35 because of endometriosis. When I was about 17 I started having really bad ovarian cysts. I started birth control to control them and 3 years later I haven't had a cyst but I also haven't had a period since I started the pill. Is this normal? I'm not sure if I should be getting regular pap smears or something. I've never had one but I don't want to keep putting it off until its too late. Is endo hereditary?