I'm always tired no matter how much sleep I get. I've required 10+ hours to function in a day, but also take naps throughput the day. Lately I haven't been able to sleep. I wake up with my heart pounding and jumping awake in terror. Now I'm on the opposite side and it sucks! I've had a sleep study, and I didn't have sleep apnea, but they did say i only spent 13% of the time in REM sleep. It also takes me 205 minutes to get to REM sleep. It's not liw enough to be a disorder I guess, but it does explain my excessive sleepiness.