Chicken or Egg

Last night I managed to sleep from about 5:00am to 6:00am. Consequently nauseous when I got up. Fortunately the husband told me to stay home and rest today. In between the rather fitful bouts of sleep, I did some research on sleeplessness and bipolar. Although most researchers do link the two, there does not seem to be a consensus. Does the sleeplessness bring on the mood swings? Or is it the result of mood swings? As for me, I don't care which causes which at this point. I just want some normal sleeping patterns. I want to sleep the undrugged sleep of.... oh, of a cat for 8 hours a night.