Exhausted!

Kyli • 24. Married to my best friend. Pregnant with my little rainbow 🌈👶🏼🎀.
This is my first pregnancy, I'm 4 weeks 5 days today and I feel like I'm always tired! I woke up today at 7:30 am, and laid down to take a nap around 2 because I was tired and not feeling well, but I didn't wake up until 6 and it was a struggle to get out of bed. I'm still exhausted but feeling better. Is this normal? And when does it go away?