The Lullaby (2017)

Returning to her home town, overwhelmed by the birth of her firstborn, nineteen-year-old Chloe van Heerden tries to come to terms with motherhood. Despite the support from her own mother, Chloe struggles with the demands of caring for a newborn child. The incessant crying of her baby, the growing sense of guilt and paranoia send her into a dark depression. With a heightened urge to protect her son, she sees danger everywhere.

Source: TMDb