Definitely. I'm more depressed when I sleep a lot, but more anxious when I don't. For probably about five years now, I think I rarely ever reach the REM stage. I usually wake up every thirty minutes to an hour, every hour. I can sleep the recommended amount or more and still feel like I need more sleep because it's always interrupted. The slightest noice or movement will wake me up. I don't even have the sound on my alarm. I wake up just from it vibrating away from my body. Sleeping two hours in a row is a blessing to me. A couple of years ago, I slept four hours straight and I was amazed. I can go days without sleeping and then oversleep for days, but it's never adequate sleep. I always wonder just how much of an impact this chronic, poor quality of sleep has had on my mental and physical health. It all deteriorated very quickly after this became a problem.