Hello,
I'm not able to take HRT. Luckily the day-time hot flushes aren't too bad but the night sweats are a pain and disturb my sleep. Do you get night sweats too? I've found that having a very thin single duvet helps somewhat (my husband has his own thicker single duvet so he's comfortable too, next to me in bed). Also I invested in a Chillow which I put in a thin pillow-case next to me and roll onto it if I do overheat.
Best wishes, hope you find something that works for you.