I am extremely tired 5dpo i take naps that last all day when i wake up again i feel tired enough to go back to sleep could this be an early pregnancy ?

Here's a few tips: Experts suggest the following measures for reducing fatigue and recharging energy: 1) Add some exercise; 2) Treat sleep troubles (as warranted: cognitive therapy, address sleep apnea if present; some benefit from yoga, tai chi, meditation); 3) Manage pain (if present, identify what makes pain worse & what eases it). Ref. ArthritisToday2015