You have to learn to trust/follow your 'instincts'. [=to trust your feelings about what is right or true even when you cannot be sure that it is right or true]
Her 'instincts' told her that something was wrong. [=she believed that something was wrong even though there was no obvious reason to believe it]
Her 'killer instincts' have helped her become one of the top tennis players in the world.
(..) the chief and I. But of course, Cato, all great detectives have one thing in common. And you know what that is? Instinct. That rare ability... to know immediately without having to stop and reason. And in my business, it can easily mean the difference between life and death. All right, I'll get it. Ah, thank you. Yes, that split-second timing when instinct tells you... that- A new wave of assassinations. An opposition spokesman has categorically denied- I tell you, (..)1975 The Return of the Pink Panther