I have a problem with Mental Exhaustion. When I was in high school. I had to get up at 7 a.m. By 12p.m I was to tired to pay attention so I would fall asleep. I got in so much trouble I dropped out. I'm mentally to tired for the effort to spell words right or solve simple math problems and have trouble finishing books. I'm persistent but I'm forced to stop at things that I do because I get to tired. In my 20's I started to have Libido problems. There was less stimulation, drive and motivation. I thought it was depression, so my doctor put me on Paxil and that diminished what like sex drive I had left. I switched to zoloft after one year and switch to that for six months. It didn't help me though. For the last 7yrs. Iv tried to sleep 8 hr. get up at 9a.m and by 2p.m I would be drowsy tired. By the third day my voice would crack and I would get sick as if I were up for the three days. So I got A job From 1p.m to 10p.m so I could sleep till noon and have enough energy to ride my bike three miles, work then ride back. Skate or run on my days off. I don't smoke, drink, do drugs. I eat healthy, take vitamins and exercise. This worked for about 7 yrs. besides the lack of motivation for anything and low sex drive. Recently in the past 2yrs. sleeping 13hrs. being up from 1p.m to 10p.m I feel in a dream like state. Not felling alive, not happy or sad. I laugh when it is appropriate. I'm getting more drowsy every day I'm worried I'm not going to be able to wake up at all eventually.