I had taken estrogen replacement for approximately 4 years. I just underwent surgery for DCIS and am no longer on hormones. I had terrible symptoms when my menopause started (hot flashes, night sweats, insomnia) and feared they would return as soon as I stopped. Its been 30 days and I have no symptoms yet. How long does it take for hormones to get out of your system? I'm just waiting for the shoe to drop. It doesn't make sense but I actually feel better not taking them.