Do dogs or cats know if your pregnant??

Sunni🌻

For the past couple days my pup is extra clingy. She’s 9 years old always followed me everywhere but now she’s sniffing me. She laid on my lap and sniff my stomach a couple times & keeps giving me looks lol.. I wonder if she knows I’m pregnant. I’m almost 5 weeks so it’s very early . This is my puggle baby Nyla ❤️