Was there a point where your kid knew you were pregnant and he/she started acting different? My daughter is about a year…

Was there a point where your kid knew you were pregnant and he/she started acting different? My daughter is about a year & a half and she looked at my pregnant belly funny one day and she’s been acting super strange since. Waking up at the crack of dawn, being super clingy to me alllllll day, fussy, cranky, etc. I’ve checked her temp over and over and no fever, still eating a lot like usual. Don’t know what’s wrong or what to do, but I’m exhausted y’all😩 #HelpMe