Advice or experiences after radical hysterectomy and no hrt allowed

Hi I am newly diagnosis with ovarian cancer ( gct that ruptured) .my consultant has recommended full hysterectomy ovaries everything etc but I'm not allowed hrt I'm only 40 and really worried about the instant onset of menopause symptoms and nothing to regulate my body .

I am looking for people who have had the same experience and what symptoms they suffered and if it's as bad as I'm reading it's making me really nervous