When I was in high school, I used to sleep the average 7-8 hours and wake up relatively refreshed most of the time, have breakfast and proceed with the rest of my routine. Now the bare minimum for me is 9 hours, but on average I sleep 10-11 hours, on bad days I could sleep 12 or more. And the morning always feel terribly groggy, I can never have breakfast until several hours have passed. I have tried getting up immediately, going to the shower, but then I just am semi-asleep at the kitchen table afterwards. And if I do try to sleep just 8 hours I'm gonna feel terrible, like extremely forgetful, unable to concentrate, tired, etc., essentially always on the brink of falling back asleep/sleeping on my feet. So I feel like I actually need those 10-11 hours and that it's not just my bad habit, although it's hard to say objectively. 

I get a fair share of exercise (some 5k running on treadmill, rowing machine, free weights) eat my veggies and all, so again I don't feel like it's lack of fitness or vitamines. 

I'm seeing a therapist and take medication as well. 

And then I'm always somewhat fatigued. Did the dishes? Have to lie down for a bit. Cleaned up my room? Lie down., etc. And it's not the same way like when you're tired after a gym session, it feels like a general lack of energy. 

I also have Gilbert's syndrome which may exacerbate all of the above, but again I'm not sure how much of that is real and how much is just hypochondria talking. 

Is there any way I could combat aforementioned fatigue and oversleeping? Because in a way it's a vicious cycle: I'm accomplishing much less then I want in a day which induces depressive thoughts. 

Although right now the school is over and there's no stress, obligations or reasons for any depressive thoughts and yet I'm exhausted and sleep those crazy hours. 

Sorry for the sloppy writing and thanks for reading.