Movies with an atmosphere similar to Coherence and Primer?

Hi guys, do you know any similar movies? It doesn't need to be about time travel or sci-fi, i want something with a similar atmosphere, I don't really know how to describe it, maybe 'scary' is the word, I know these movies aren't horror, but to me, they're really scary.

Another good example is Chernobyl , is not a horror series but is still scary af.