The House of the Devil
(2009)

Samantha (Jocelin Donahue) escapes the Ulman house after killing Victor (AJ Bowen) and Vivian (Mary Woronov).  She nearly makes it to the car left behind by her dead friend, Megan (Greta Gerwig), in the graveyard but is plagued by strange visions and pains in her body following the ritual the Satanists had performed on her.  Mr. Ulman (Tom Noonan) catches up to her and begs her to stop fighting what is happening to her.  It looks like Samantha is going to shoot him, but at the last minute turns the gun on herself.  Mr. Ulman shouts in horror as she falls to the ground, apparently dead.

Cut to a hospital.  A news anchor in the background is talking about how the previous night's lunar eclipse ended suddenly -- just as Samantha would have shot herself -- in a way that defies scientific explanation.  We see Samantha lying in a hospital bed with bandages around her head.  A nurse promises the unconscious Samantha that she'll be just fine ... and reveals that not only is Samantha mysteriously pregnant, but her baby will survive as well ...

Thanks Greg B!