Hot flushes are the absolute pitts and they can hang around for quite a while unfortunately.
If your cancer was hormone positive they will tell you to avoid anything with phytoestrogens in them. That includes black cohosh and red clover as they don't know if they interfere with Tamoxifen or AI's and of course nobody is studying that so you just get told to avoid them. I had the pharmacy ring swisse about their menopause ease tablets and they said not to take them. There was someone put on here a while ago (can't remember who it was though) that the evening primrose and starflower tablets helped.
I've just started taking them and couldn't find any contraindications with those two things. We'll see if they help knock out the few night flushes I still get.
All the best lovely, flushes sure do suck big time.