Oh I do know how you feel I had a very early hysterectomy due to cancer in my very early 20s and HRT was in it's experimental stage and didn't really help. Years later I took it. for 10 years, to counteract Osteoporosis and due to that I managed to get over the early stages of it and now my bone density is "about normal" for my age, whatever that means. For that reason alone I would recommend any ladies to go on a HRT course, thro' their physician of course.
As far as the sweats are concerned I still get them, at night, due to pain medication and am in the process of making my own special bedding!
http://www.quiltingboard.com/t-135929-1.htm it helps me at night as the sheets don't stick to me and the quilted ones soak up the sweat and makes me more comfortable.
I hope you discuss it with your Doctor as I know a lot of people swear by natural remedies but there is not a lot of proof that they help and as far as the Osteoporosis danger is concerned as far as I know only HRT helps, and taking regular doses of Glucosamine tablets, again the Doctor may prescribe them for you my Doc does.