Problem with getting resources and adding to list. (c#)

Hello, I'm having some trouble with what I hoped to be a reasonably easy piece of code. My intention is for it set a GameObject variable to be a file ending in .prefab from a resources folder and then changing the name to be a number before adding it to a list and increasing said number until there's no remaining GameObjects in the folder.

For some reason, it doesn't want to work properly - but I'm getting no errors, so I have no clue what's gone wrong.

 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 
 public class PrefabSetup : MonoBehaviour {
 
     public static List<GameObject> prefabRooms = new List<GameObject>();
     public static int prefabCount = 0;
 
     void Start () {
 
         int objectNumber = 0;
         string objectNumberAsString;
         bool prefabsLoaded = false;
 
         while (prefabsLoaded == false) {
             GameObject currentObject = Resources.Load("*.prefab") as GameObject;
 
             System.Threading.Thread.Sleep (50);
 
             if (currentObject == null) {
                 Debug.Log ("currentObject = null");
                 prefabsLoaded = true;
             } else {
                 Debug.Log (currentObject.ToString ());
                 objectNumberAsString = objectNumber.ToString ();
                 currentObject.name = objectNumberAsString;
 
                 Debug.Log ("Set To: " + currentObject.ToString ());
                 prefabRooms.Add (currentObject);
 
                 objectNumber++;
                 prefabCount++;
             }
         }
     }
     
     void Update () {
     
     }
 }

Any help would be appreciated. The reason I'm doing it this way and not simply doing a GameObject array with a Resources.LoadAll is I eventually want to have a progress bar or loading percentage and I want it to visibly go through every file and load it one after the other.