when my treatment finished I had asked about this with my oncology team, I was advised against any HRT as there is not enough evidence to suggest that HRT is a safe route after cc. Many things are taken into account such as your quality of life after surgical menopause occurs. Such as your moods, degree of symptoms, your age, etc. It was suggested to me that unless my symptoms were severe and making it hard to function daily that to avoid any HRT. I also spoke to my GP and he did suggest some natural remedies for my hotflashes and night sweats such as sage tea. In the end he gave me a perscription for my hotflashes and these pills have helped me tremendously but it did take a bit of playing with an amount. My only symptoms were the hotflashes so I have been very lucky.
It is best to really do some research on HRT and see if it's right for you. There are other options to relieve symptoms. You really have to weigh the benifits and risks and detirmine for yourself.
Good luck with whatever you guys decide. I just wanted to tell you my experience.