Dog sensing pregnancy?

Hannah • 5 beautiful children 14 angel babies pregnant and shooting for #6: the last one
So i would be 7 dpo today. I have been dog sitting my in laws dog for a few weeks and she is normally all in her own world not clingy or anything. Today ever since i woke up she has been up my ass even so much as to sit out side the bathroom while i pee or just when i get up to put a cup in the sink following me around. This is totally not like her. Could there be something going on here?