My cat is in labor..

Savv • IT'S A BOY! Logan Sullivan💙😍 June 7th, 2019 💕 7.9lbs, 20in.💙😘 MissC - September 9, 2017.👶👼❤️

Okay so I'm not sure what to do, my cat has been in the first stage of labor for a little over 20 hours, and I'm not sure at all on how to tell when she may be getting close to having her babies. Can anyone help me out?! She's been in and out of the closet all day and if I'm not in there with her she will come looking for me and meow until I go back to the closet with her.