Wakening up this early...

Currently 38+2 weeks and the past 3 mornings I have woke between 4 and 5 am bright as a button. 🧐 Why can I not just sleep a good 10 hours. Want as much rest we baby comes but every part of me is sore. Nightmare 🙄🙄🙄 it's currently 5.05 am and been for an hour already