I saw many movies about agoraphobia, so I knew what to expect. Ana suffered a family trauma and her life is a nightmare, but she tried to deal with it in her one way: lots of red wine, medication, watching black and white movies (great movies, I'm a fan!), watching her neighbours and working online (buy the way, from where was her income? because she was nit worried about this aspect!?!).
So, she is seeing something, but no one believes her. She reaches to a point even her doubts what she saw.