I went through Years of hardly remembering a dream. It is something you should mention to your regular doctor the next time you see him, especially if you are tired all the time. You don't half to be over-weight to have sleep apnea. Do you snore at night? Or suddenly wake up, like you are falling or drowning? During bad apneas you stop breathing and your body will jolt you awake will a shot of adrenaline.