Why don't I have any focus?

When I wake up every morning, regardless of how much sleep I get, I am exhausted. I eat healthy, I exercise and I even take vitamins.

When someone is talking to me, I can’t focus on what they are saying. I try really hard but I have a lot of difficulty paying attention.

It feels like I have no energy to do the things I want to do, let alone NEED to do. I go to bed at 10 p.m, wake up at around 8 a.m and by 6–7 p.m, I’m exhausted and barely able to keep my eyes open.

Emotionally, I’m at an extreme low or I’m just okay. I don’t think I ever get truly depressed, though, but I am usually feeling down and constantly worried, whether there is something to worry about or not.

I don’t really have any focus, and I can never complete a task because I’m either too tired or I get distracted by other things I need to do. Is this just me being lazy? Is there something I can do?