Has anyone's animals known they were pregnant before they did????

AF is due on or around the 7th, I tested yesterday and it was a BFN... I've felt super tired and not my best the past week, my cat is nice but usually snuggles by my feet and today I sat down and he ran right up to me, put his arm across mine and would not stop cuddling up on me... has anyone ever had an animal become very affectionate and then turn out to be pregnant? I sound fucking nuts ill be the first to say😂 but I've totally read about this! Maybe he just missed me? Lol no clue..