Just wondering what could be the possible side effects of over sleeping. I hear that the ideal amount of sleep is about 6-8 hours a night. For about the past year I have been sleeping rediculous amounts. I sleep on average 10 hours a night, sometimes 12. If i wake up after 8 hours i still feel exhausted and cant bring myself out of bed and all i wanna do is go back to sleep, so i will for a few more hours. But after doing this for so long, now when i do get up after sleeping 10-12 hours, i feel so groggy and crappy for a few hours after waking, feel like my head is in a cloud all day, have no motivation or desire to do too much, need a nap a few hours later (which is stupid, how can you sleep 12 hours, be up for 4, then need a nap?). I feel like my sleep schedule is making me feel like straight sh*t all day. Then when i try and go to bed at night i sit there for a while before i am actually able to clear my head, stop thinking about things, and actually fall asleep. Is this all normal things that happen when one sleeps too much?