NOOOO MY PUSSY AAAAA

Not quite a pussy cuz he's a kitten but that's not the point here-
My little kitten is dyinggggHe's suddenly so lethargic, unresponsive and cold So right now I'm doing what I could, warming him up and staying beside him:((((( but:(((( I don't think he's getting better:(((( I can't go to the vet because it's closed at the moment so I'm really helpless
Have y'all ever experienced something like this? Like your pet dying and you can't really do anything about it? Please feel free to share some of your experiences