Again, we're all different. Some women will breeze through it, one day they'll just realize they haven't had a period for a while. There are many things you can try. Insomnia is a common complaint during peri-menopause. This insomnia often takes the form of an inability to sleep through the night.
Women often wake up in the wee hours of the morning and have great difficulty getting back to sleep.
Sometimes these awakenings immediately precede a night sweat or at least a warm period where one wants to throw off the covers. Some times a woman will wake up with heart pounding and in an anxiety state for no apparent reason. Very vivid dreams may wake up other women. Other times there doesn't seem to be any reason at all why one awakes at two and three and four a.m. unable to fall back to sleep for 20 or 40 minutes or even longer. It is possible that these awakenings are due to the body's inability to maintain a consistent temperature due to hormone fluctuations.