If you are like me and many people living in northern climates, the winter months with their overcast skies, lack of sunlight and cold temperatures and can bring on the ''Winter Blues.'' February seems to always be my most difficult month. By then, winter just seems to have dragged on long enough. I find myself sleeping more, eating more and I have trouble getting motivated to do everyday things especially in the evenings after work. I just want to hibernate. If you are experiencing some of these symptoms too, we are not alone. According to the American Psychiatric Association, 25 percent of people living in middle to northern latitudes of the U.S. experience winter doldrums. The more severe form of this condition is called Seasonal Affective Disorder or SAD. SAD can bring on depression, anxiety, mood changes, and loss of libido as well as the sleep problems, lethargy and overeating.