I am constantly tired and sleep for long periods during the day. I had a sleep study done more than 5 yrs ago with a diagnosis of sleep apnea. However, I have had no real problems until the last few months. I do not have the usual symptoms; loud snoring, pauses in breathing, etc. but am about 30 lbs overweight. I do not have difficulty falling asleep and wake up only once or twice a night to use the bathroom. Over the last few months I am always very fatigued and fall asleep in my chair many times during the day. My doctor thinks it is due to sleep apnea but I think it may be something else - any thoughts?