oh forgot to tell you I've been bleeding for years...3 months at a time, 6 weeks at a time etc etc...had several d7cs, removed polyps, nothing worked. Have constant deep cramping also....waiting for endo biopsy results and hysterectomy date.
Not just like you, but I do know a woman who had one cervix and then her uterus was divided by a septum (which essentially meant that she had two uteruses, I guess.) Anyway, she struggled through her teens and into her twenties with heavy, long periods, and terrible cramping. A surgery to correct the 'deformity' (to remove the septum) only caused the bleeding and cramping to be worse, and she had a hysterectomy before the age of 30.
Considering your situation, what will all the, ah, 'extra storage space', and the endometriosis, etc., I would be more surprised if your CA-125 was normal than for it to be mildly elevated!