Please help me identify a movie!

[SvenG]

I need help to identify a really scary movie!! I rembember some scenes from it, but not the name of the movie. Can someone please help me find the name?
This is what I remember:
- The movie is based around a couple, a man and a woman. Curved or "wavy" crosses are appearing now and then, for example on a foggy window.
- after the appearence of the crosses on the window a hell of a storm breaks out. It starts raining and the trees outside are almost torn from the ground.
- a little black boy lays on a surgery table. Suddenly, he opens his eyes. Scared the shit out of me!!
- the couple are trying to find out what the curved cross-sign means.

Thank you in advance! I really hope someone can tell me the name of the movie!