I can't tell you what you have, but here's my story. You sound like me, but the only thing is, I don't nap as much because it makes me even more cranky. My sleeping habits are crap now, but even when I am on a good schedule, I need at least 9 hours of sleep. Even then, I could still sleep more, but if I do, it makes me feel worse. My thing is, I'll wake up at the usual time. Then I have my tea and try to get myself up and going. I'll do what it is that I have to do, but I too get my first wave around noon and I'm pretty much down hill from there. I'm very moody because I always feel tired. I also get dizzy. If I get up from a sitting, lying, crouching position too fast I too feel like I'm about to black out. My vision gets blurry for a few seconds, then I take a few deep breaths/ lean against something and then I am okay. I too was also very active until this past year and a half. About that time ago, I started working at a bakery, and being that it changed my whole sleeping schedule all my symptoms really came to the forefront. My schedule before that-would go to sleep at 8:30p wake 5:30a, have my coffee, do some school work(homeschooled) and then go workout. I was really in shape, ate really well, but I would get tired after my work out and be useless for the rest of the day-but being that I wasn't working at the time it didn't really matter. I was 19 at the time. Then I started working at the bakery, would go in at 2:00p and get off anywhere between 7:00-9:00p. So right there, I was working when I would normally be asleep. I was only working 4 days of the week. That was for pie topping. The one reason the hired me was because they also needed a cashier. So I said I would do it. So I would do that on the days I was topping. But that got hard for me because I usually had to wake up really early to be there by 6:30a and awake to do my job. Then there were days where they needed me to top the pies in the afternoon. It was 12-13 hour days. I was only getting paid minimum wage(at the time $7.25) so after a few months I quit. Since then I still have not gotten better. Have not been working out(soo tired), so I have put on a few pounds and feel sluggish. I have been to the doctor a few times: my blood work always comes back normal; no anemia; one doctor thought that I had fibromyalgia, but she kind of forced anti-depressants on me being that a healthy diet wasn't helping. I don't like to take medication- I like to take more of a natural route. So I stopped seeing her. I have to make a appointment soon with a new primary care giver so we can try to get to the bottom of this. I just know that Chronic Fatigue Syndrome and Fibromyalgia kind of go hand in hand so its hard to diagnose. It also depends on the doctors area of expertise. I will let you know what happens. I am also going through something else right now and think that I might be pregnant. I won't know for sure until Sept. 30th. If not then I really feel crazy and would like to know what's going on. It's no fun being tired all the time for no apparent reason. So people tell me to do something and maybe I'd have more energy, but that makes it worse. I'm sorry for ragging on...I hope you too find some help. Just remember in a case like this, it's always good to get a second opinion. If you want to talk, I'm always on. Oh and I'll be 21 on Oct. 2nd, so this has been going on for a long, long time now- but still no answers.