I was having the same problem for a long time. I started seeing a pulmonary doctor and he tested me for idiopathic hypersomnia. Basically your tired and they really can't tell you why. I am now taking Nuvigil on a daily basis which is a long lasting stimulant that helps me to stay awake and alert throughout the day. Nuvigil is safe to use and non habit forming. Really works for me
