Echoes

Echoes is a 2014 American supernatural horror film directed by Nils Timm and starring Steven Brand, Kate French, and Kevin Brewerton. The story revolves around a young writer struggling with horrifying, sleep-paralysis induced visions, who retreats with her boyfriend to an isolated desert house. As the visions intensify, she finds herself on the verge of losing her mind ... or uncovering a life-threatening secret.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.