Does your dog know your pregnant, before you do?

Dreaming • Mumma bear to baby boy 🧸 and expecting again 🤰🏼 💕 Dreaming always dreaming 💕
I hear some people's dogs know that they were pregnant before they knew. Did this happen to you? 
My dog has been funny lately, super playful and wants heaps of attention. His usually really chill, i think dogs can smell when your pregnant because of the hormones. So I hope I am pregnant 🤞 or someone's feeding my dog sugar lol