Good day and thank you for visiting Health care magic.
I noted that your symptoms started 15 years ago which means you were 48 years at that time. I suspect that hormonal imbalance which happen at the time of menopause
could be causing this. For majority of people it lasts only for few years but for some, it might last several more years.
You must also check your thyroid
Postmenopausal hot flushes respond to hormone pills but at this age they may be unsafe. There are several other things like evening prim XXXXXXX oil and flax seeds etc which contain natural estrogen
. That may be of use.
However to pinpoint your issues, please meet an endocrinologist
who can advice you further.
Hope this helps. Please don't hesitate to ask if you need further advice