Hot flashes. How long will they last and are there any natural treatment for them ?

I hade to go through hysterectomy,my doctor removed my ovaries as well since my mother died of ovarian cancer,its been 3 years now and I am still having the hot flashes and the mood swings, I took HRT for 18 months aprox. and now I am cutting them down till I can do without them, is there any natural treatment for that to replace the HRT?

http://womenshealth.about.com/cs/menopaus1/a/naturalmenopaus.htm

http://www.holisticonline.com/remedies/hrt/hrt_herbs_for_menopause.htm

http://www.homemademedicine.com/home-remedies-for-menopause.html

Your Dr may also be able to help …..ask about natural treatments and compounding pharmacies in your area