How to get my Player Death Sound To Stop Playing?

Long Story Short: I'm trying to make a Game Over Sound for my player. What should happen is whenever my player dies, the pause menu shows up, and the Death Sound should play once. However, what is happening instead is my Death Sound repeatedly playing over and over again, even though I have looping unchecked. Any advice on how to fix this?

Here's my code. I have it on the Player Movement Script I use to control my Player because that's where I have my Health System and such:

 using System.Collections;
 using System.Collections.Generic;
 using System.Threading;
 using UnityEngine;
 using UnityEngine.SceneManagement;
 
 public class PlayerMovement : MonoBehaviour
 {
 
     public CharacterController controller;
 
     public static bool _gameIsPaused = false;
     public GameObject _pauseMenuUI;
 
     public int maxHealth = 100;
     public int currentHealth;
 
     public HealthBar healthBar;
 
     public float speed = 6f;
     public float gravity = -9.81f;
     public Transform groundCheck;
     public float groundDistance = 0.4f;
     public LayerMask groundMask;
     public float jumpHeight = 3f;
     public float sprint = 60f;
 
     Vector3 velocity;
     bool isGrounded;
 
     [SerializeField]
     AudioSource hitSound;
 
     [SerializeField]
     AudioSource deathSound;
 
     public bool alreadyPlayed = false;
 
     void Start()
     {
         currentHealth = maxHealth;
         healthBar.SetMaxHealth(maxHealth);
     }
 
     void Update()
     {
 
         //checks if we've hit the ground
         isGrounded = Physics.CheckSphere(groundCheck.position, groundDistance, groundMask);
 
         if (isGrounded && velocity.y< 0)
         {
             velocity.y = -2f;
         }
 
         float x = Input.GetAxis("Horizontal");
         float z = Input.GetAxis("Vertical");
 
         Vector3 move = transform.right * x + transform.forward * z; //Moves based on x and z movement and where the player is facing
         //don't want to use new Vector3() because those are GLOBAL Coordinates
 
         controller.Move(move * speed * Time.deltaTime);
 
         if (Input.GetButtonDown("Jump") && isGrounded)
         {
             velocity.y = Mathf.Sqrt(jumpHeight * -2f * gravity);
         }
 
         if (Input.GetKey(KeyCode.LeftShift))
         {
             controller.Move(move * sprint * Time.deltaTime);
         } 
 
         if (currentHealth <= 0)
         {
             Pause();
             GameOver();
         }
 
         //we use Velocity to handle Gravity
         velocity.y += gravity * Time.deltaTime;
 
         //physics of a free fall
         controller.Move(velocity * Time.deltaTime);
     }
 
     public void OnTriggerEnter(Collider other)
     {
         if (other.gameObject.CompareTag("Hazard"))
         {
             other.gameObject.SetActive(false);
             TakeDamage(25);
         }
 
         if (other.gameObject.CompareTag("Heal"))
         {
             other.gameObject.SetActive(false);
             GiveHealth(20);
         }
 
         if (other.gameObject.CompareTag("Projectile"))
         {
             hitSound.Play();
             TakeDamage(15);
         }
     }
 
     void TakeDamage(int damage)
     {
         currentHealth -= damage;
 
         healthBar.SetHealth(currentHealth);
     }
 
     void GameOver()
     {
         deathSound.Play();
         alreadyPlayed = true;
         if (alreadyPlayed)
         {
             return;
         }
     }
 
     void GiveHealth(int heal)
     {
         currentHealth += heal;
 
         healthBar.SetHealth(currentHealth);
     }
 
     public void Pause()
     {
         Cursor.lockState = CursorLockMode.None;
         Cursor.visible = true;
         _pauseMenuUI.SetActive(true);
         Time.timeScale = 0f;
         _gameIsPaused = true;
     }
 
     public void Kill()
     {
         this.gameObject.SetActive(false);
     }
 }