Manual Collision Detection through triggers...

Here's my movement script, it moves in directions by 1 unit. I tried to implement bools that allow movement in the four directions, but I came across an issue... As of now, my character does collide with an object tagged as "wall" when facing it... That is because there is a trigger in front of the character that detects when a wall is directly forward as its OnTriggerEnter function is run. This works to an extent. If I were to use my method, I would need four different triggers for all sides of the character (a cube). They would ideally be placed as children to the player in the Hierarchy, and so I would need to know how I can access a child's component (the box collider, and the child being an empty preferably.)

Now, I can either carry out with my approach with some help from the community, or someone can suggest a better way if there is any. Both would be extremely appreciated.

Here is my movement script that has the manual collision detection:

 using UnityEngine;
 using System.Collections;
 
 public class PlayerMovement : MonoBehaviour {
 
     public bool CanMoveForward;
     public bool CanMoveBackward;
     public bool CanMoveLeft;
     public bool CanMoveRight;
 
     //Translation:
     float movSpeed = 4.0f;
     Vector3 pos;
     Transform tr ;
     bool moving = false;
     
     //Rotation:
     bool rotating = false;
     public float rotSpeed = 360f;
     float rotDegrees = 0f;
     Quaternion rotToAngle ;
     
     void Start () {  
         pos = transform.position;
         tr = transform;
         CanMoveForward = true;
         CanMoveBackward = true;
         CanMoveLeft = true;
         CanMoveRight = true;
     }
     
     // Update is called once per frame
     void Update () {
         Debug.DrawRay(transform.position, transform.forward, Color.red);
         //Input:
         if (!moving && !rotating) {
             if (Input.GetKey(KeyCode.D) && tr.position == pos && CanMoveRight) {
                 //pos += Vector3.right;
                 pos += transform.right;
                 moving=true;
 //                print ("MOVE LEFT");
             } else if (Input.GetKey(KeyCode.A) && tr.position == pos && CanMoveLeft) {
                 pos += -transform.right;
                 moving=true;
 //                print ("MOVE RIGHT");
             } else if (Input.GetKey(KeyCode.W) && tr.position == pos && CanMoveForward) {
                 pos += transform.forward;
                 moving=true;
 //                print ("MOVE FORWARD");
             } else if (Input.GetKey(KeyCode.S) && tr.position == pos && CanMoveBackward) {
                 pos += -transform.forward;
                 moving=true;
 //                print ("MOVE BACK");
             } else if (Input.GetKey(KeyCode.Q) && tr.position == pos) {
                 rotDegrees -= 90f;
                 //rotToAngle = Quaternion.Euler(0, rotDegrees, 0);
                 rotToAngle = Quaternion.Euler(0, rotDegrees, 0);
                 rotating = true;
 //                print ("TURN LEFT");
             } else if (Input.GetKey(KeyCode.E) && tr.position == pos) {
                 rotDegrees += 90f;
                 //rotToAngle = Quaternion.Euler(0, rotDegrees, 0);
                 rotToAngle = Quaternion.Euler(0, rotDegrees, 0);
                 rotating = true;
 //                print ("TURN RIGHT");
             }
         }
 
 
         
         //Translation:
         if (moving) {
             if (Vector3.Distance(transform.position,pos) <0.05f){
                 transform.position = pos;
                 moving=false;
 //                print ("FINISHED MOVE");
             } else {
                 transform.position = Vector3.MoveTowards(transform.position, pos, Time.deltaTime * movSpeed);
             }
         }
         
         //Rotation:
         if (rotating) {
             if (Quaternion.Angle(transform.rotation,rotToAngle) <10f) {
                 transform.rotation = rotToAngle;
                 rotating=false;
 //                print ("FINISHED TURN");
             } else {
                 transform.rotation = Quaternion.RotateTowards(transform.rotation, rotToAngle, rotSpeed * Time.deltaTime);
             }
         }
     }
 
     void OnTriggerEnter(Collider other) {
         if(other.CompareTag("wall")) {
             Debug.Log("Collided with 'wall'");
             CanMoveForward = false;
         }
     }
 
     void OnTriggerExit(Collider other) {
         CanMoveForward = true;
     }
 }
 

Thanks in advance! :D