I am currently 23 weeks and 1 day today. I sleep face down on my stomach and my angel is perfectly fine. She's good. Its fine.
Girl Im 37Wks 4Days And I Sleep Half On My Side Half On My Tummy I Just Tuck Pillows Under My Tummy, But Believe Me Baby Will Let U Know!
Opps sorry forgot. 17 weeks
The baby will let you know it's uncomfortable.
I would only start to stress if it became painful or uncomfortable. You're body usually wouldn't let you sleep on your stomach once you get to a stage where it could cause issues.