Animals sense pregnancy?

Neecee

So I had unprotected sex many times in the last month, pregnancy never crossed my mind until I realized today that my cat is really clingy. Normally she doesn’t wanna be around or touched but lately she lays under me when I lay on the couch. If I’m sitting there she comes up and cuddles next to me and sleeps. Someone made a point to me about cats being able to sense it. Has anyone ever experienced this?