For the past few years, I haven't felt like myself. I used to do very well in school, have excellent memory, and just generally felt much sharper. Now I sleep about 10 hours a night, and I still end up needing a nap during the day to make it through. I can't seem to remember anything, and I have a hard time retaining information. I eat well and exercise, and I feel as if the problem may be hard to pinpoint.