It may be a matter of vitamin deficiency due to a diet not nourishing the body. Sometimes sleep comes easily and you awaken restless. Check a vitamin chart for the symptoms you have concerns of and try supplemental vitamins and some form of exercise daily. While the weather may also effect loafing and sedentary activity, do things to stimulate the mind during the day. If no change occurs, a general health checkup may be in order as some foods also lower energy levels.