Hi,
It too am HER2+/HR- and not on anti-hormonals. I had night sweats before cancer and since. I got my period back after chemo.
My Chinese Medicine diagnosis of the night sweats says that it is due to kidney qi deficiency, more specifically kidney yin. It was suggested to me by a different practitioner that perhaps I might just be overheated at night, which isn't an unreasonable suggestion. The other side of that is that I'm often cold at bedtime and cover up well, cold feet and all, then a few hours later I might be awoken to a night sweat. They aren't consistent for me, not even how much I sweat, rarely is it so bad that I need to change clothing during the night.
http://www.shen-nong.com/eng/exam/in...ht_sweats.html
Perhaps totally out there for you, but in Chinese Five Element there is also a 24 hour clock that associates different organ systems with times during the day. You might be able to figure out which of your organs are unhappy when the night sweats happen -- for me it is usually during the time of the liver and gall bladder, 1-3am.
https://www.pinterest.com/pin/192951165262228619/
My sweat lately at night has been quite stinky as well. My Chinese Medicine doctor said that this is because my body is detoxing at night. That just shows me that it is likely multi-layered and not clear-cut. Since I've had the night sweats going back to before cancer I figure that it isn't awful but that I'm still off-balance from before.
I'm on Chinese herbs for restoring my balance, including tea pill formulas for energy, kidney energy, liver energy.
I am also still low on magnesium, something that I need to continue to supplement. Low magnesium can also cause disrupted sleep and night sweats and anti-HER2 therapies are all depleting of magnesium in the body. Have you ever had your magnesium level checked?
http://drsircus.com/medicine/magnesi...toms-diagnosis
HTH