How do I pickup multiples of the same item with the same tag?

Hello, I'm very new to C#. I know the answer to this question may be obvious for most, but I'm stuck at the moment.

I wrote a "PlayerHealth/Damage Script". So far, it just has one type of damage, and 4 types of health items. (items are tagged) When I place one of each item in a row, everything works as expected. (Player picks up health OnTriggerEnter, & item destroys itself etc)

The problem is, when I place multiple "copy's" of the Prefab throughout the scene, they basically "don't match up". (ex. entering a trigger of one item (ex. bread) could Destroy a different copy of the same item (ex. bread(2)) and so on.

Here is my Script: using UnityEngine; using System.Collections; using UnityEngine.SceneManagement; public class PlayerDamageScript : MonoBehaviour {

 int playerHealth = 100;        
 int damage = 10;

 public AudioClip bite;
 public AudioClip drink;
 public AudioClip belch;
 public AudioClip ouch;
 public AudioClip dead;

 void Start () 
 {
     print (playerHealth);
     playerHealth = 100;
 }

 void Update()
 {
     if (playerHealth <= 0) 
     {
         Death ();
     }

     if (playerHealth >= 100)
     {
         playerHealth = 100;
         if (playerHealth > 100) 
         {
             GetComponent<AudioSource> ().clip = belch;
             GetComponent<AudioSource> ().Play ();
         }
     }
 }
     
 //PLAYER HEALTH/DAMAGE TRIGGERS// 
 //*****************************//

 void OnTriggerEnter(Collider other)
 {
     if (other.gameObject.tag == "Enemy")
     {
         playerHealth -= damage; 
         print ("Enemy Hit You!" + playerHealth) ;

         GetComponent<AudioSource> ().clip = ouch;
         GetComponent<AudioSource> ().Play ();
     }


     if (other.gameObject.tag == "apple") 
     { 
         playerHealth += 10;
         print ("You ate an Apple + 10 Health =" + playerHealth);
         Destroy (GameObject.FindWithTag ("apple"));                

         GetComponent<AudioSource> ().clip = bite;
         GetComponent<AudioSource> ().Play ();
     }


     if (other.gameObject.tag == ("bread"))
     { 
         playerHealth += 25;
         print ("You ate Bread + 25 Health =" + playerHealth);
         Destroy (GameObject.FindWithTag ("bread"));

         GetComponent<AudioSource> ().clip = bite;
         GetComponent<AudioSource> ().Play ();
     }


     if (other.gameObject.tag == "cheese") 
     { 
         playerHealth += 50;
         print ("You ate Cheese + 50 Health =" + playerHealth);
         Destroy (GameObject.FindWithTag ("cheese"));

         GetComponent<AudioSource> ().clip = bite;
         GetComponent<AudioSource> ().Play ();
     }


     if (other.gameObject.tag == "potion") 
     { 
         playerHealth += 100;
         print ("You drank a healing Potion + 100 Health =" + playerHealth);
         Destroy (GameObject.FindWithTag ("potion"));

         GetComponent<AudioSource> ().clip = drink;
         GetComponent<AudioSource> ().Play ();
     }


 }

 public void Death()
 {
     SceneManager.LoadScene (8);
 }

}

So, how do I make multiple copy's of a prefab and pick up each one (correctly) by tag?

Any help would be greatly appreciated! Thanks!