Forgive my random thread hopping
Yes!!! My ancient, slightly senile chihuahua named Belle (who was a rescue and I have had for over ten years!
) was basically THE reason I took a pregnancy test in the first place
This will likely sound crazy to anyone who doesn't have pets...but more than a week before my period was due, Belle began 'stalking' me. Out of seemingly nowhere she was acting SO weird....
Previously Belle could have given two sh*ts about where I was in the house - but that day she just started staying at my heels. She would follow me everywhere - if I shut a door to the bathroom she would lay down outside it. When I went to the kitchen to cook she would sit a few feet away and stare intently at me. She began laying on all of my clothes/towels whether dirty or clean. She had never wanted to be in the bed - but suddenly she started crying to get up in our bed at night. God forbid I set my suitcase on the floor while putting clothes away - she nearly rubbed her paws raw from trying to dig a hole into it.
She would pace around me and make a "barrier" so our other dog couldn't come close and if other dog did, she would snarl and show teeth
(never more than that - as our other dog swiftly got the hint!)
Sooo....I tested...barely BARELY positive at 8dpo!! Turns out Belle knew something we didn't!
Her new behavior continued through my pregnancy, tapered off a bit towards the middle, then she went absolute batshit crazy again the night before DD was born - even though official due date was two weeks away! Bit my MIL who she usually loves!!
Apologies for the long example - but, in short, Your dog sounds totally tuned into you and your body.
I truly believe animals sense things humans can't even typically find with our five senses..:So be extra patient and kind to your little buddy! REASSURE him, calm him, let him know you're okay with the other animals being around you! Guarantee he will follow your lead!!!