Hi SweetChiel,
If you're looking for movies you could watch, how about Constantine or The Devil's Advocate? It's supernatural with demons and the Devil. I don't know if you could really use it as a reference but you could always try :D and the movies will probably put you in the 'evil/mysterious/demon-y' kinda mood.
Also a quick tip: you should drink gingertea (and I mean the fresh one from the root) daily, then you won't get a cold ever again (I haven't had a cold in nearly 4 years). I hope you'll feel better soon! <3