Whats wrong with me, im always tired and feel like i need to lay down?

no matter how much sleep i get, i still always feel tired and fatigued. and at night when i want to fall asleep i cant fall asleep easily, i toss and turn and am hot and then cold. I get random headaches, and i feel like im never just generally in a good mood, i feel like im always nasty and negative. could i be depressed? idk