I'm really sorry your dear kitty is sick, and that you're feeling alone...
like Bizi said we are here for you. Please keep talking to us. We will listen. And reply.
When our cat was terminally ill (we knew it was terminal) she refused food - even fancy feast. my mother used to boil chicken breast for her, and then blender it... a chicken smoothie. and feed her through a syringe (no needle). she would accept that. she had tooth problems as well so partly that was an issue with eating. just thought i'd pass that along in case your cat is refusing canned food.
sending hope and good vibes to you and your kitty
~ waves ~