Animals sensing pregcancy?

So I have three kittens. 2 of which like some attention but no all the time and one of which who does not like attention at all. She keeps to herself.

However, the past couple of days, all 3 of them won't leave me alone lol. One cats licks me and rubs against my body all night long, another rubs up against my belly all the time, and the other won't stop fitting for my attention. It's crazy!

My AF isn't due until the 30th so I have around 5 days left to test. But I'm wondering if my cats are sensing pregnancy before I even get a BFP?

Anyone else have this??