ok, so i never heard about the vampire disease before i was at stage 4 of it... :-/

i know, stupid. so i tried to feed on sleeping people, but i always got busted before i could. so then i used the console command "setstage 000eafd5 10", and people are not attacking me anymore. but i still have that game-breaking red screen all the time. i hate it! i cant see anything, especially during the night. i also don′t have the soul quest that should cure it (the one with fallion), so i must be "cured". but i cant see ****.

what do i do?

Reloading a previous save might be the only thing you could do. you shouldn't use the console like that. it messes up your game.