I drink a lot of water and feel tired a lot of the time, my urine is a dark yellow, is this normal?

Possibley: However, i would recommend you see your primary care doc to check issues like basic kidney function, thyroid, glucose/a1c, and electrolytes. They could be individual issues or they could be related something that might be causing everything, including diabetes, renal damage, or thyroid function. I know this answer does not clarify exactly what it is, but i hope the recommendation helps.Best of luck!