My dog knew I was pregnant before I did

An
So we have a 3yo chocolate lab and she's very affectionate- other than she straight refuses to be the "little spoon" during snuggle time. She will lay all 75lbs of herself ALL over us, but doesn't let us cradle or snuggle her back for more than 5secs. About a week before my BFP, I noticed a few nights in a row - she began sleeping with her back to my belly in a total "little spoon" position. I've read that pets know your scent so well they can sense when your body chemistry changes as with pregnancy. (I think the cat probably knows too, but doesn't care in true cat fashion lol) Has anyone else had a pet hint at your BFP before your BFP?