Seriously sleep is non existent for me

My cats used to sleep at night but now-they are turning nocturnal-actually primarily Winton! Kodak and Perf are sleeping at night but my boy Winton just can't settle. I'm going to have to have this checked out because I'm not getting a night sleep now because he's always crying in the middle of the night. And when I call him he's not staying on his pillow with me..... And I wonder why I'm exhausted-probably because I'm up most of the night.