I have mania and depression back to back, day in and day out, sometimes at the same time. I dont sleep much either and my boyfriend gets mad at me because I dont get tired so I dont go to sleep, even if id try, my thoughts keep me wide awake, so why bother. I'll go two or three days not needing any sleep then I'll hit depression and finally pass out, but then i still only sleep about 7 hours. I wish i had this problem when I was going to college (i could have been studying on those nights and got better grades)