If you are in surgical menopause and you still have a uterus (i.e. you did not have a hysterectomy as well as ovary removal), then you should take progestogen therapy as long as you are taking estrogen therapy, since it is important for protecting you against endometrial cancer.
Visit www.iapmd.org/surgery for lots of evidence-based information and resources for those considering, going through or recovering from surgery for PMDD/PME.