My inventory system only picks up one item when there are several

I spent hours writing this Inventory script and I'm sure there are easier ways to do it. I'm using a trigger on both the player and the "bandage" item. it works flawlessly until I try to pick up multiple bandages. No matter how many are there, it just picks up one. I understand why, I just can't find a solution for it. Any help would be most appreciated.

 var invIsOpen : boolean = false;
 
 var Player : GameObject;
 var MainCamera : GameObject;
 
 var numOfBandages : int = 0;
 var numOfPAmmo : int = 0;
 
 
 var bandagePrefab : Transform;
 var pistolAmmoPrefab : Transform;
 
 
 var pickUpMessage : boolean = false;
 
 var isBandage : boolean = false;
 var isPAmmo : boolean = false;
 
 var invWeight : float = 0.0f;
 
 var canPickupMore : boolean = true;
 
 
  var windowRect : Rect = Rect (20, 20, 500, 500);
 
 function Update()
 {
  //pickup restraints
   if(invWeight == 100.0)
   {
     canPickupMore = false;
   }
  
    //Pickup Setup
    
    if(pickUpMessage == true)
    {
      
      if(isBandage == true)
      {
      if(canPickupMore == true)
      {
        if(Input.GetKey(KeyCode.F))
        {
          numOfBandages += 1;
          invWeight += 0.2f;
          isBandage = false;
          pickUpMessage = false;
        
        }
        }
      
      
      }
    
    
    
    }
    
    
    
    
    
    
    
    
    
    
   if(Input.GetKey(KeyCode.E))
   {
     invIsOpen = true;
   }
   if(Input.GetKey(KeyCode.Escape))
   {
     invIsOpen = false;
   }
  if(invIsOpen == true)
  {
   
   Player.GetComponent(MouseLook).enabled = false;
   
  }
  else
  {
   
   Player.GetComponent(MouseLook).enabled = true;
  
  }
 
 }
 
 
 function OnTriggerEnter(itemEnt : Collider)
 {
   
  if(itemEnt.gameObject.tag == "Bandage")
   {
     pickUpMessage = true;
     isBandage = true;
   }
 
 
 }
 function OnTriggerExit(itemEx : Collider)
 {
   pickUpMessage = false;
   isBandage = false;
 }
 
 
 function OnGUI()
 {
  if(pickUpMessage == true)
  {
   GUI.Label(Rect(Screen.width/2, Screen.height/1.5, 200,50), "Press 'F' to pickup");
   
  }
   if(invIsOpen == true)
   {
         windowRect = GUI.Window (0, windowRect, DoMyWindow, "Inventory");
   
   }
 }
 ////////////////////
 //INVENTORY WINDOW//
 ////////////////////
 
 function DoMyWindow (windowID : int) 
 {
 //Inventory Weight
  GUI.Label(Rect(210, 20, 100, 50), "Weight(kg): " +invWeight); 
        GUI.DragWindow (Rect (0,0, 10000, 20));
     //Bandages
     GUI.Label(Rect(10, 50, 100, 50), "Bandages: " +numOfBandages); 
          if(numOfBandages > 0)
          { 
           if(GUI.Button(Rect(120, 50, 50, 20), "Drop 1"))
           {
            numOfBandages += -1;
            var dropBandage = Instantiate(bandagePrefab, GameObject.Find("Drop Point").transform.position, Quaternion.identity);
            dropBandage.rigidbody.AddForce(transform.forward * 2); 
           }
           if(GUI.Button(Rect(180, 50, 50, 20), "Use 1"))
           {
            numOfBandages += -1;
           }
          }
     //Pistol Ammo
     GUI.Label(Rect(10, 70, 100, 50), "Pistol Ammo: " +numOfPAmmo);
          if(numOfPAmmo > 0)
          { 
           if(GUI.Button(Rect(120, 50, 50, 20), "Drop 1"))
           {
            numOfPAmmo += -1;
            var dropPammo = Instantiate(pistolAmmoPrefab, GameObject.Find("Drop Point").transform.position, Quaternion.identity);
            dropPammo.rigidbody.AddForce(transform.forward * 2); 
           }   
          }
 }