Fiction adaptation- research

I have been looking into the supernatural forces used in films. i have decided that due to the fact i do not have a huge budget, I want to make my film have the sense that there is a supernatural force without showing it. I would do this by concentrating on the sounds, lighting and generally trying to build up the atmosphere. It will also depend on the actress I have keeping up the performance of scared, vulnerable, panicked etc.
I have been researching films that use the presents of paranormal forces in films, one that stood out to me was Paranormal Activity 3. This film gives the audience the impression and sense that there is a supernatural force haunting a family but you do not see what it is. i want to do this in my film to build up the suspense and keep the audience intrigued as too what is going to happen next.