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.
(..) Now I really see what's goin' on here. Oh, what are you talkin' about? I don't even wanna hear it. Look, I'm an animal, and I got instincts. I know you two were diggin' on each other. I could feel it. You're crazy. I'm just bringing her back to Farquaad. Oh, come on, Shrek. (..)2001 Shrek