Have you ever felt that you're damn tired yet you don't even know why??? You haven't done anything really tiring but your whole body ache and you have a hard time focusing because you are freaking tired to think about anything. And no matter how long you sleep, it is still the same. You're still freaking tired. Fvck. Maybe I'm just depressed.

Same. Even when doing things i like I feel tired and sleep isn't helping either

If I oversleep I tend to be more tired.

It's called fatigue
usually caused by stress or depression