Script doesn't take health player script

Hello, I am working on a shooter where player get damage if he doesn't hit an ennemy. I do a GetComponent of my player and do TakeDamage() but it say that my player has currentHealth=0.

Do you know how to fix it ?

Thanks you for your help.

Bullet.cs :

 public class Bullet : MonoBehaviour
 {
     public GameObject player;
 
     void OnCollisionEnter2D(Collision2D collision)
     {
         if (IsAnEnnemy(collision))
         {
             GameObject hit = collision.gameObject;
             Debug.Log($"Ennemy spotted : { (hit != null?hit.name:" NoNe")}");
         }
         else
         {
             Debug.Log("Not an ennemy...");
             PlayerHealth health =  player.GetComponent<PlayerHealth>();
             health.TakeDamage();
         }
         Destroy(gameObject);
     }
 
 
     bool IsAnEnnemy(Collision2D col)
     {
         return col.collider.tag == "Ennemy";
     }
 }

PlayerHealth.cs :

 public class PlayerHealth : MonoBehaviour
 {
     public Image state;
     public Sprite[] spriteHealth;
 
     public Animator animator;
 
 
     public int maxHealth = 3;
     public int currentHealth;
 
     // Start is called before the first frame update
     void Start()
     {
         currentHealth = maxHealth;
         state.sprite = spriteHealth[currentHealth-1];
     }
 
     // Update is called once per frame
     void Update()
     {
         if (Input.GetKeyDown(KeyCode.E))
         {
             TakeDamage();
         }
 
         if(currentHealth == 0)
         {
             Debug.Log("You die");
             Destroy(gameObject);
         }
     }
 
     public void TakeDamage()
     {
         if(currentHealth != 0)
         {
             currentHealth--;
             animator.SetInteger("health", currentHealth);
             state.sprite = spriteHealth[currentHealth - 1];
         }
         Debug.Log(currentHealth);
     }
 }