Im 23 weeks and i still sleep a ton i normally sleep at 12am until 1pm lol and once in a while take naps as well :)
Everything comes out normal at the docs
My right side does tend to hurt due to me always laying down
I do too but usually till noon . But I was also working so I was always tired. Now that I quit I will wake up early depending if I want to get up or not I'll go back to bed. Just go with the flow for a lil your body is probably just catching up if it don't get better then just set an alarm get up early if anything take a short nap in the day . Your body probably just needs to be put on a different schedule.
Your iron levels could be low. Go get a blood test :)
When I was that early I would sleep from like 12-1am take like 5 pm some days.... (I didn't know I was pregnant at the time but looking back it explains a lot) lol just set an alarm and get up and go. Idk I didn't have anything to do so it didn't bother me but idk maybe talk to your doctor about it as well