Movie where the father sees (and kills) zombies, but it turns out that they were imagined

The scene I remember extends a dad seeing zombies everywhere and desperately trying to get to his family and bring them to safety. Upon arriving there the movie watcher realizes that there are no zombies and all the people the father killed are his neighbours and friends. His terrified family, being shocked, agrees to come with him and they ‘flee’ by car.

I know it wasn’t an AAA production and also not a budget or trash movie but somewhere in between.