This is "call of the void". Note that other replies simply call it "intrusive thoughts", but I think that's an overgeneralization, because call of the void is a

This is "call of the void". Note that other replies simply call it "intrusive thoughts", but I think that's an overgeneralization, because call of the void is a specific response to keep you wary of hazards, not generic random background noise or self-harmful impulses or anything that "intrusive thoughts" traditionally implies.