Each character in your book will have a different way of describing things pertaining to themselves and the world around them.
It’s no less for their emotions.
Your manly ex-Navy SEAL isn’t going to describe his surprise as a gasp and a fluttering in his chest. He’s going to feel like a hollow-point copperhead has slugged him in the gut.
Likewise, your small farming town preacher’s daughter isn’t going to describe the heated family argument as the headache-inducing staccato clamor of Chinese grandmothers at the San Francisco Chinatown fish market. She’ll describe the sounds as the fierce pelting of hailstones echoing in an empty barn, resonating in her skull as if they were falling on her head instead of the roof.
When describing your character’s emotions, think about their gender, backgrounds, experiences. Make the emotions you describe specific and unique to that character’s personality and backstory.