hi im looking for manga im read years ago about story a girl who doing daily lives, but in the end,that girl actually already became zombie from start of manga (not gakkougurashi/school life)

anyone know what this is?

If you could give more plot details or genres that would be great but could it be one of these?

Zonbi Shoujo no Fujimi-san
Koishigawa-san is a Carnivore
Sankarea

thanks for reply.
it just randomly popped in my head, i think it's a oneshot manga.she didn't realize that she was already zombie, and event in manga just in her head.