Your Wedding DVD... that should do the trick
It sounds like you don't scare easy. I don't either and can't think of one movie that really scared me, except when I was kid.
For me it's a toss up between Cujo and Deliverance. Oh, yeah, IT was also really scary, although it was a two part tv movie, not a movie theater movie.
Ju-on, Martyrs, The ring, The tale of two sisters, The crazies
well actually, non of them are that scary, but thei wil make you hug your pilow at least once xD
Ju-on is much better than Grudge. There are really creepy children there xD Martyrs is a french movie, and I absolutely adore french movies, they have not only good acting, action and much blood but in Martyrs if you will get the psychological idea of it, this freakin' movie can stuck in your head for good xD
As a child: The Gates of Hell
(an Italian zombie movie that scared me so badly I vomited all night after watching it- it destroyed my little nerves lol)
As and adult: Insidious
I don't watch scary movies, but I'd say that Prometheus looks pretty freakin' scary O_O
But Chronicle was pretty scary too.
"The Grudge" (2004).
Apparently the Japanese original, "Ju-on", is worse :/