Hi and welcome to the forum, I sympathise,night sweats are awful, I have an air con unit in my room and also a fan on all night,thankfully my OH doesn't mind a cold bedroom. Re the HRT,that was my reason for not going on it,3 close family with BC but I think it all depends on if it is oestrogen related BC,have a look at Dr Newson on YouTube,she's very knowledgeable on Hrt and who should and should not take it