Pregnancy & Pets: can they tell???

Natalie β€’ πŸ’œ πŸ‘«Sept. 4, 1999 β€’ πŸ’ Feb. 19, 2013 β€’ πŸ‘°πŸ» Sept. 5, 2014 β€’ πŸ‘ΆπŸ»πŸ‘ΆπŸ» Nov. 17, 2016 πŸ’•
My fur baby girl, Nimitz, has always been a clingy kitty. She's always napped on my tummy when we watch tv, and she's always been demanding of my focus being on her. But in the last couple weeks she's been super fussy and clingy, and unsettled. She doesn't sit still, easily disturbed and meows at me constantly. She's healthy, just got a checkup in January and she's only 6 yo.
Does she know I'm pregnant? Are my hormones affecting her? Anyone else have this experience?